International ID

A systematic review of observational studies and clinical trials found dolutegravir and raltegravir to be safe and effective for treating teens and children living with HIV.

Effectiveness was higher across dolutegravir studies, the authors reported. After 12 months of treatment and observation, viral suppression levels were greater than 70% in most studies assessing dolutegravir. Viral suppression with raltegravir after 12 months varied between 42% and 83%.

“Our findings support the use of these two integrase inhibitors as part of WHO-recommended regimens for treating HIV,” said lead study author Claire Townsend, PhD, an epidemiologist and consultant to the World Health Organization HIV department in Geneva. “They were in line with what has been reported in adults and provide reassurance for the continued use of these two drugs in children and adolescents.”

The study was published in the Journal of the International AIDS Society.
 

Tracking outcomes for WHO guidelines

Integrase inhibitors, including dolutegravir and raltegravir, have become leading first- and second-line treatments in patients with HIV, largely owing to their effectiveness and fewer side effects, compared with other antiretroviral treatments.

Monitoring short- and long-term health outcomes of these widely used drugs is critical, the authors wrote. This is especially the case for dolutegravir, which has recently been approved in pediatric formulations. The review supported the development of the 2021 WHO consolidated HIV guidelines.

Dr. Townsend and colleagues searched the literature and screened trial registries for relevant studies conducted from January 2009 to March 2021. Among more than 4,000 published papers and abstracts, they identified 19 studies that met their review criteria relating to dolutegravir or raltegravir in children or adolescents aged 0-19 years who are living with HIV, including two studies that reported data on both agents.

Data on dolutegravir were extracted from 11 studies that included 2,330 children and adolescents in 1 randomized controlled trial, 1 single-arm trial, and 9 cohort studies. Data on raltegravir were extracted from 10 studies that included 649 children and adolescents in 1 randomized controlled trial, 1 single-arm trial, and 8 cohort studies.

The median follow-up in the dolutegravir studies was 6-36 months. Six studies recruited participants from Europe, three studies were based in sub-Saharan Africa, and two studies included persons from multiple geographic regions.

Across all studies, grade 3/4 adverse events were reported in 0%-50% of cases. Of these adverse events, very few were drug related, and no deaths were attributed to either dolutegravir or raltegravir.

However, Dr. Townsend cautioned that future research is needed to fill in evidence gaps “on longer-term safety and effectiveness of dolutegravir and raltegravir in children and adolescents,” including “research into adverse outcomes such as weight gain, potential metabolic changes, and neuropsychiatric adverse events, which have been reported in adults.”

The researchers noted that the small sample size of many of the studies contributed to variability in the findings and that most studies were observational, providing important real-world data but making their results less robust compared with data from randomized controlled studies with large sample sizes. They also noted that there was a high risk of bias (4 studies) and unclear risk of bias (5 studies) among the 15 observational studies included in their analysis.

“This research is particularly important because it supports the WHO recommendation that dolutegravir, which has a particularly high barrier of resistance to the HIV virus, be synchronized in adults and children as the preferred first-line and second-line treatment against HIV,” said Natella Rakhmanina, MD, PhD, director of HIV Services & Special Immunology at the Children’s National Hospital in Washington, D.C. Dr. Rakhmanina was not associated with the study.

Dr. Rakhmanina agreed that the safety profile of both drugs is “very good.” The lack of serious adverse events was meaningful, she highlighted, because “good tolerability is very important, particularly in children” as it means that drug compliance and viral suppression are achievable.

Two authors reported their authorship on two studies included in the review, as well as grant funding from ViiV Healthcare/GlaxoSmithKline, the marketing authorization holder for dolutegravir.

A version of this article first appeared on Medscape.com.

A systematic review of observational studies and clinical trials found dolutegravir and raltegravir to be safe and effective for treating teens and children living with HIV.

Effectiveness was higher across dolutegravir studies, the authors reported. After 12 months of treatment and observation, viral suppression levels were greater than 70% in most studies assessing dolutegravir. Viral suppression with raltegravir after 12 months varied between 42% and 83%.

“Our findings support the use of these two integrase inhibitors as part of WHO-recommended regimens for treating HIV,” said lead study author Claire Townsend, PhD, an epidemiologist and consultant to the World Health Organization HIV department in Geneva. “They were in line with what has been reported in adults and provide reassurance for the continued use of these two drugs in children and adolescents.”

The study was published in the Journal of the International AIDS Society.
 

Tracking outcomes for WHO guidelines

Integrase inhibitors, including dolutegravir and raltegravir, have become leading first- and second-line treatments in patients with HIV, largely owing to their effectiveness and fewer side effects, compared with other antiretroviral treatments.

Monitoring short- and long-term health outcomes of these widely used drugs is critical, the authors wrote. This is especially the case for dolutegravir, which has recently been approved in pediatric formulations. The review supported the development of the 2021 WHO consolidated HIV guidelines.

Dr. Townsend and colleagues searched the literature and screened trial registries for relevant studies conducted from January 2009 to March 2021. Among more than 4,000 published papers and abstracts, they identified 19 studies that met their review criteria relating to dolutegravir or raltegravir in children or adolescents aged 0-19 years who are living with HIV, including two studies that reported data on both agents.

Data on dolutegravir were extracted from 11 studies that included 2,330 children and adolescents in 1 randomized controlled trial, 1 single-arm trial, and 9 cohort studies. Data on raltegravir were extracted from 10 studies that included 649 children and adolescents in 1 randomized controlled trial, 1 single-arm trial, and 8 cohort studies.

The median follow-up in the dolutegravir studies was 6-36 months. Six studies recruited participants from Europe, three studies were based in sub-Saharan Africa, and two studies included persons from multiple geographic regions.

Across all studies, grade 3/4 adverse events were reported in 0%-50% of cases. Of these adverse events, very few were drug related, and no deaths were attributed to either dolutegravir or raltegravir.

However, Dr. Townsend cautioned that future research is needed to fill in evidence gaps “on longer-term safety and effectiveness of dolutegravir and raltegravir in children and adolescents,” including “research into adverse outcomes such as weight gain, potential metabolic changes, and neuropsychiatric adverse events, which have been reported in adults.”

The researchers noted that the small sample size of many of the studies contributed to variability in the findings and that most studies were observational, providing important real-world data but making their results less robust compared with data from randomized controlled studies with large sample sizes. They also noted that there was a high risk of bias (4 studies) and unclear risk of bias (5 studies) among the 15 observational studies included in their analysis.

“This research is particularly important because it supports the WHO recommendation that dolutegravir, which has a particularly high barrier of resistance to the HIV virus, be synchronized in adults and children as the preferred first-line and second-line treatment against HIV,” said Natella Rakhmanina, MD, PhD, director of HIV Services & Special Immunology at the Children’s National Hospital in Washington, D.C. Dr. Rakhmanina was not associated with the study.

Dr. Rakhmanina agreed that the safety profile of both drugs is “very good.” The lack of serious adverse events was meaningful, she highlighted, because “good tolerability is very important, particularly in children” as it means that drug compliance and viral suppression are achievable.

Two authors reported their authorship on two studies included in the review, as well as grant funding from ViiV Healthcare/GlaxoSmithKline, the marketing authorization holder for dolutegravir.

A version of this article first appeared on Medscape.com.

A systematic review of observational studies and clinical trials found dolutegravir and raltegravir to be safe and effective for treating teens and children living with HIV.

Effectiveness was higher across dolutegravir studies, the authors reported. After 12 months of treatment and observation, viral suppression levels were greater than 70% in most studies assessing dolutegravir. Viral suppression with raltegravir after 12 months varied between 42% and 83%.

“Our findings support the use of these two integrase inhibitors as part of WHO-recommended regimens for treating HIV,” said lead study author Claire Townsend, PhD, an epidemiologist and consultant to the World Health Organization HIV department in Geneva. “They were in line with what has been reported in adults and provide reassurance for the continued use of these two drugs in children and adolescents.”

The study was published in the Journal of the International AIDS Society.
 

Tracking outcomes for WHO guidelines

Integrase inhibitors, including dolutegravir and raltegravir, have become leading first- and second-line treatments in patients with HIV, largely owing to their effectiveness and fewer side effects, compared with other antiretroviral treatments.

Monitoring short- and long-term health outcomes of these widely used drugs is critical, the authors wrote. This is especially the case for dolutegravir, which has recently been approved in pediatric formulations. The review supported the development of the 2021 WHO consolidated HIV guidelines.

Dr. Townsend and colleagues searched the literature and screened trial registries for relevant studies conducted from January 2009 to March 2021. Among more than 4,000 published papers and abstracts, they identified 19 studies that met their review criteria relating to dolutegravir or raltegravir in children or adolescents aged 0-19 years who are living with HIV, including two studies that reported data on both agents.

Data on dolutegravir were extracted from 11 studies that included 2,330 children and adolescents in 1 randomized controlled trial, 1 single-arm trial, and 9 cohort studies. Data on raltegravir were extracted from 10 studies that included 649 children and adolescents in 1 randomized controlled trial, 1 single-arm trial, and 8 cohort studies.

The median follow-up in the dolutegravir studies was 6-36 months. Six studies recruited participants from Europe, three studies were based in sub-Saharan Africa, and two studies included persons from multiple geographic regions.

Across all studies, grade 3/4 adverse events were reported in 0%-50% of cases. Of these adverse events, very few were drug related, and no deaths were attributed to either dolutegravir or raltegravir.

However, Dr. Townsend cautioned that future research is needed to fill in evidence gaps “on longer-term safety and effectiveness of dolutegravir and raltegravir in children and adolescents,” including “research into adverse outcomes such as weight gain, potential metabolic changes, and neuropsychiatric adverse events, which have been reported in adults.”

The researchers noted that the small sample size of many of the studies contributed to variability in the findings and that most studies were observational, providing important real-world data but making their results less robust compared with data from randomized controlled studies with large sample sizes. They also noted that there was a high risk of bias (4 studies) and unclear risk of bias (5 studies) among the 15 observational studies included in their analysis.

“This research is particularly important because it supports the WHO recommendation that dolutegravir, which has a particularly high barrier of resistance to the HIV virus, be synchronized in adults and children as the preferred first-line and second-line treatment against HIV,” said Natella Rakhmanina, MD, PhD, director of HIV Services & Special Immunology at the Children’s National Hospital in Washington, D.C. Dr. Rakhmanina was not associated with the study.

Dr. Rakhmanina agreed that the safety profile of both drugs is “very good.” The lack of serious adverse events was meaningful, she highlighted, because “good tolerability is very important, particularly in children” as it means that drug compliance and viral suppression are achievable.

Two authors reported their authorship on two studies included in the review, as well as grant funding from ViiV Healthcare/GlaxoSmithKline, the marketing authorization holder for dolutegravir.

A version of this article first appeared on Medscape.com.

The respiratory illness RSV causes 1 in 50 deaths in children under age 5, mostly in low-income and middle-income countries, a new study says.

But RSV – formally known as respiratory syncytial virus – is also a problem in high-income nations. In those countries, 1 in 56 otherwise healthy babies are hospitalized with RSV during their first year of life, said the study, which was published in the Lancet Respiratory Medicine.

Researchers looked at the health records of 9,154 infants born between July 1, 2017, and July 31, 2020, who were treated at health centers across Europe. Previous studies have concentrated on babies with preexisting conditions, but this one looked at otherwise healthy children, researchers said.

“This is the lowest-risk baby who is being hospitalized for this, so really, numbers are really much higher than I think some people would have guessed,” said study coauthor Louis Bont, MD, a professor of pediatric infectious diseases at Wilhelmina Children’s Hospital at University Medical Center Utrecht in the Netherlands, according to CNN. He is also chairman of the ReSViNET foundation, which aims to reduce RSV infection globally.

The study said more than 97% of deaths from RSV occur in low-income and middle-income countries. The study concluded that “maternal vaccination and passive [immunization] could have a profound impact on the RSV burden.”

In developed nations, children who get RSV usually survive because they have access to ventilators and other health care equipment. Still, just being treated for RSV can have long-range negative effects on a child’s health, Kristina Deeter, MD, chair of pediatrics at the University of Nevada, Reno, told CNN.

“Whether that is just traumatic psychosocial, emotional issues after hospitalization or even having more vulnerable lungs – you can develop asthma later on, for instance, if you’ve had a really severe infection at a young age – it can damage your lungs permanently,” she said of the study. “It’s still an important virus in our world and something that we really focus on.”

The Lancet study was published days after the CDC warned public health officials that respiratory viruses, including RSV, are surging among children across the country.

A version of this article first appeared on WebMD.com.

The respiratory illness RSV causes 1 in 50 deaths in children under age 5, mostly in low-income and middle-income countries, a new study says.

But RSV – formally known as respiratory syncytial virus – is also a problem in high-income nations. In those countries, 1 in 56 otherwise healthy babies are hospitalized with RSV during their first year of life, said the study, which was published in the Lancet Respiratory Medicine.

Researchers looked at the health records of 9,154 infants born between July 1, 2017, and July 31, 2020, who were treated at health centers across Europe. Previous studies have concentrated on babies with preexisting conditions, but this one looked at otherwise healthy children, researchers said.

“This is the lowest-risk baby who is being hospitalized for this, so really, numbers are really much higher than I think some people would have guessed,” said study coauthor Louis Bont, MD, a professor of pediatric infectious diseases at Wilhelmina Children’s Hospital at University Medical Center Utrecht in the Netherlands, according to CNN. He is also chairman of the ReSViNET foundation, which aims to reduce RSV infection globally.

The study said more than 97% of deaths from RSV occur in low-income and middle-income countries. The study concluded that “maternal vaccination and passive [immunization] could have a profound impact on the RSV burden.”

In developed nations, children who get RSV usually survive because they have access to ventilators and other health care equipment. Still, just being treated for RSV can have long-range negative effects on a child’s health, Kristina Deeter, MD, chair of pediatrics at the University of Nevada, Reno, told CNN.

“Whether that is just traumatic psychosocial, emotional issues after hospitalization or even having more vulnerable lungs – you can develop asthma later on, for instance, if you’ve had a really severe infection at a young age – it can damage your lungs permanently,” she said of the study. “It’s still an important virus in our world and something that we really focus on.”

The Lancet study was published days after the CDC warned public health officials that respiratory viruses, including RSV, are surging among children across the country.

A version of this article first appeared on WebMD.com.

The respiratory illness RSV causes 1 in 50 deaths in children under age 5, mostly in low-income and middle-income countries, a new study says.

But RSV – formally known as respiratory syncytial virus – is also a problem in high-income nations. In those countries, 1 in 56 otherwise healthy babies are hospitalized with RSV during their first year of life, said the study, which was published in the Lancet Respiratory Medicine.

Researchers looked at the health records of 9,154 infants born between July 1, 2017, and July 31, 2020, who were treated at health centers across Europe. Previous studies have concentrated on babies with preexisting conditions, but this one looked at otherwise healthy children, researchers said.

“This is the lowest-risk baby who is being hospitalized for this, so really, numbers are really much higher than I think some people would have guessed,” said study coauthor Louis Bont, MD, a professor of pediatric infectious diseases at Wilhelmina Children’s Hospital at University Medical Center Utrecht in the Netherlands, according to CNN. He is also chairman of the ReSViNET foundation, which aims to reduce RSV infection globally.

The study said more than 97% of deaths from RSV occur in low-income and middle-income countries. The study concluded that “maternal vaccination and passive [immunization] could have a profound impact on the RSV burden.”

In developed nations, children who get RSV usually survive because they have access to ventilators and other health care equipment. Still, just being treated for RSV can have long-range negative effects on a child’s health, Kristina Deeter, MD, chair of pediatrics at the University of Nevada, Reno, told CNN.

“Whether that is just traumatic psychosocial, emotional issues after hospitalization or even having more vulnerable lungs – you can develop asthma later on, for instance, if you’ve had a really severe infection at a young age – it can damage your lungs permanently,” she said of the study. “It’s still an important virus in our world and something that we really focus on.”

The Lancet study was published days after the CDC warned public health officials that respiratory viruses, including RSV, are surging among children across the country.

A version of this article first appeared on WebMD.com.

Three months after the World Health Organization declared monkeypox a public health emergency, clinical presentations and vaccination strategies are evolving.

New areas of concern include transmissions among people experiencing homelessness and severe cases in immunocompromised persons.

Agam K. Rao, MD, with the Poxvirus and Rabies Branch of the Centers for Disease Control and Prevention, updated the global picture during an annual scientific meeting on infectious diseases: As of Oct. 14, the confirmed worldwide cases number 73,288, with more than one-third of them (27,317) in the United States. Case counts in the United States, however, have been decreasing since early August.

Cases have been most commonly found in men who have sex with men (MSM), though monkeypox has also been diagnosed in cisgender and transgender women, children, and men who do not report recent sex with other men.

Shift away from White men

Dr. Rao described a demographic shift in infections from White, non-Hispanic men early on to non-Hispanic Black and Hispanic men.

“There’s a lot of emphasis right now at CDC to try to understand these spreads, whether they are household [transmission] or another contact. We know that some of the women have had sexual contact with men who were diagnosed with monkeypox,” Dr. Rao said.

In children under age 12, direct skin-to-skin contact with household members seems to be the source, she said. In adolescents, as in adults, the main source seems to be male-male consensual sex.

“And just as in adults, Black and Hispanic children have been disproportionately affected,” she said.

No sustained spread outside MSM

Dr. Rao said that so far there has been no sustained spread detected beyond the MSM community. A CDC study of inmates in Cook County Jail in Chicago at the end of September, she noted, found no secondary cases.

However, health care workers are another group that was suspected to be at higher risk given close contact with patients, although there have been only three confirmed exposures. Sharps injuries from unroofed lesions are tied to some of those confirmed or suspected cases.

“We do not recommend unroofing lesions,” she said. “We’re getting very good samples from just rigorous swabbing of the lesions.”

She said that the CDC is also monitoring “a few hundred” cases, some of them severe, among people experiencing homelessness.

“We are working to try to understand the exposures that have occurred to those individuals and whether transmission has occurred person-to-person,” Dr. Rao said.

Severe cases among immunocompromised

Also of concern are people with compromised immune systems owing to advanced HIV or organ or stem cell transplants.

Among immunocompromised persons, Dr. Rao said, “we’re seeing large necrotic lesions affecting a large percentage of body surface, lesions that continue to develop over weeks.”

Boghuma Titanji, MD, PhD, MSc, a physician-scientist at Emory University in Atlanta, and an emerging-disease specialist, addressed the difference in presentations between immunocompromised and immunocompetent patients.

She said the main distinction is the extent of the lesions. Patients with AIDS and very low CD4 counts, for instance, are presenting with more lesions and have a longer course of illness.

Dr. Rao said in an interview, “It’s really important to understand someone’s immune status and understand whether they are severely immunocompromised. If there is a concern that a person has monkeypox, also testing for HIV concurrently may be important. It could be a missed opportunity to evaluate for it, especially given the fact that these can occur together.”

Assessing the size and appearance of the lesions is important to understanding whether patients could develop severe infection, she said.

Differences from past epidemics

Dr. Titanji said the current outbreak has some differences from historic outbreaks.

The incubation period, for instance, has tended to be shorter than in previous outbreaks – now 7-10 days, with a range of 5-14 days instead of a range of up to 21 days in previous outbreaks.

There are also more cases of presentations with only single lesions, which were infrequent in past epidemics, she said.

The scope of suspected cases has also broadened, with changing clinical features.

“We have expanded the clinical descriptions to include presentations that involve isolated rectal presentation – individuals presenting solely with rectal pain as the primary manifestation of monkeypox – or presenting with a sore throat as the only manifestation,” she said.

Expanding the case definition will help identify who should be tested.

“Monkeypox is an incredible clinical mimic,” Dr. Titanji said. “The rash can really take the form of a lot of the things we encounter on a regular basis in ID. It’s important to always have a low index of suspicion to test patients when they fit the right epidemiological profile.”

Vaccine strategy has evolved

Brett Petersen, MD, MPH, captain of the U.S. Public Health Service with the CDC, said that Jynneos, licensed by the U.S. Food and Drug Administration, continues to be the primary vaccine for monkeypox. However, the strategy has changed.

Whereas the initial vaccine strategy was to administer the vaccine after known exposure, the guidance now includes vaccinating after “both known and presumed exposures, as described in the eligible populations.”

It’s now been expanded even further to include preexposure inoculations for a wide group of people at greater risk, he explained.

Early data from the CDC indicate that the Jynneos vaccine is effective.

In a report updated in September, the CDC found that among 32 U.S. jurisdictions, monkeypox incidence was much higher among at-risk, unvaccinated people for whom vaccination is recommended than among those who got the Jynneos vaccine.

“Unvaccinated people had 14 times the risk of monkeypox disease compared to people who were vaccinated,” the CDC reported.

Asked about the end goal for monkeypox, Dr. Petersen said, “Our goal should be elimination. I think that is an achievable goal, but it will depend on a lot of factors and a lot of continued public health efforts.”

Dr. Rao, Dr. Titanji, and Dr. Petersen declared no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Three months after the World Health Organization declared monkeypox a public health emergency, clinical presentations and vaccination strategies are evolving.

New areas of concern include transmissions among people experiencing homelessness and severe cases in immunocompromised persons.

Agam K. Rao, MD, with the Poxvirus and Rabies Branch of the Centers for Disease Control and Prevention, updated the global picture during an annual scientific meeting on infectious diseases: As of Oct. 14, the confirmed worldwide cases number 73,288, with more than one-third of them (27,317) in the United States. Case counts in the United States, however, have been decreasing since early August.

Cases have been most commonly found in men who have sex with men (MSM), though monkeypox has also been diagnosed in cisgender and transgender women, children, and men who do not report recent sex with other men.

Shift away from White men

Dr. Rao described a demographic shift in infections from White, non-Hispanic men early on to non-Hispanic Black and Hispanic men.

“There’s a lot of emphasis right now at CDC to try to understand these spreads, whether they are household [transmission] or another contact. We know that some of the women have had sexual contact with men who were diagnosed with monkeypox,” Dr. Rao said.

In children under age 12, direct skin-to-skin contact with household members seems to be the source, she said. In adolescents, as in adults, the main source seems to be male-male consensual sex.

“And just as in adults, Black and Hispanic children have been disproportionately affected,” she said.

No sustained spread outside MSM

Dr. Rao said that so far there has been no sustained spread detected beyond the MSM community. A CDC study of inmates in Cook County Jail in Chicago at the end of September, she noted, found no secondary cases.

However, health care workers are another group that was suspected to be at higher risk given close contact with patients, although there have been only three confirmed exposures. Sharps injuries from unroofed lesions are tied to some of those confirmed or suspected cases.

“We do not recommend unroofing lesions,” she said. “We’re getting very good samples from just rigorous swabbing of the lesions.”

She said that the CDC is also monitoring “a few hundred” cases, some of them severe, among people experiencing homelessness.

“We are working to try to understand the exposures that have occurred to those individuals and whether transmission has occurred person-to-person,” Dr. Rao said.

Severe cases among immunocompromised

Also of concern are people with compromised immune systems owing to advanced HIV or organ or stem cell transplants.

Among immunocompromised persons, Dr. Rao said, “we’re seeing large necrotic lesions affecting a large percentage of body surface, lesions that continue to develop over weeks.”

Boghuma Titanji, MD, PhD, MSc, a physician-scientist at Emory University in Atlanta, and an emerging-disease specialist, addressed the difference in presentations between immunocompromised and immunocompetent patients.

She said the main distinction is the extent of the lesions. Patients with AIDS and very low CD4 counts, for instance, are presenting with more lesions and have a longer course of illness.

Dr. Rao said in an interview, “It’s really important to understand someone’s immune status and understand whether they are severely immunocompromised. If there is a concern that a person has monkeypox, also testing for HIV concurrently may be important. It could be a missed opportunity to evaluate for it, especially given the fact that these can occur together.”

Assessing the size and appearance of the lesions is important to understanding whether patients could develop severe infection, she said.

Differences from past epidemics

Dr. Titanji said the current outbreak has some differences from historic outbreaks.

The incubation period, for instance, has tended to be shorter than in previous outbreaks – now 7-10 days, with a range of 5-14 days instead of a range of up to 21 days in previous outbreaks.

There are also more cases of presentations with only single lesions, which were infrequent in past epidemics, she said.

The scope of suspected cases has also broadened, with changing clinical features.

“We have expanded the clinical descriptions to include presentations that involve isolated rectal presentation – individuals presenting solely with rectal pain as the primary manifestation of monkeypox – or presenting with a sore throat as the only manifestation,” she said.

Expanding the case definition will help identify who should be tested.

“Monkeypox is an incredible clinical mimic,” Dr. Titanji said. “The rash can really take the form of a lot of the things we encounter on a regular basis in ID. It’s important to always have a low index of suspicion to test patients when they fit the right epidemiological profile.”

Vaccine strategy has evolved

Brett Petersen, MD, MPH, captain of the U.S. Public Health Service with the CDC, said that Jynneos, licensed by the U.S. Food and Drug Administration, continues to be the primary vaccine for monkeypox. However, the strategy has changed.

Whereas the initial vaccine strategy was to administer the vaccine after known exposure, the guidance now includes vaccinating after “both known and presumed exposures, as described in the eligible populations.”

It’s now been expanded even further to include preexposure inoculations for a wide group of people at greater risk, he explained.

Early data from the CDC indicate that the Jynneos vaccine is effective.

In a report updated in September, the CDC found that among 32 U.S. jurisdictions, monkeypox incidence was much higher among at-risk, unvaccinated people for whom vaccination is recommended than among those who got the Jynneos vaccine.

“Unvaccinated people had 14 times the risk of monkeypox disease compared to people who were vaccinated,” the CDC reported.

Asked about the end goal for monkeypox, Dr. Petersen said, “Our goal should be elimination. I think that is an achievable goal, but it will depend on a lot of factors and a lot of continued public health efforts.”

Dr. Rao, Dr. Titanji, and Dr. Petersen declared no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Three months after the World Health Organization declared monkeypox a public health emergency, clinical presentations and vaccination strategies are evolving.

New areas of concern include transmissions among people experiencing homelessness and severe cases in immunocompromised persons.

Agam K. Rao, MD, with the Poxvirus and Rabies Branch of the Centers for Disease Control and Prevention, updated the global picture during an annual scientific meeting on infectious diseases: As of Oct. 14, the confirmed worldwide cases number 73,288, with more than one-third of them (27,317) in the United States. Case counts in the United States, however, have been decreasing since early August.

Cases have been most commonly found in men who have sex with men (MSM), though monkeypox has also been diagnosed in cisgender and transgender women, children, and men who do not report recent sex with other men.

Shift away from White men

Dr. Rao described a demographic shift in infections from White, non-Hispanic men early on to non-Hispanic Black and Hispanic men.

“There’s a lot of emphasis right now at CDC to try to understand these spreads, whether they are household [transmission] or another contact. We know that some of the women have had sexual contact with men who were diagnosed with monkeypox,” Dr. Rao said.

In children under age 12, direct skin-to-skin contact with household members seems to be the source, she said. In adolescents, as in adults, the main source seems to be male-male consensual sex.

“And just as in adults, Black and Hispanic children have been disproportionately affected,” she said.

No sustained spread outside MSM

Dr. Rao said that so far there has been no sustained spread detected beyond the MSM community. A CDC study of inmates in Cook County Jail in Chicago at the end of September, she noted, found no secondary cases.

However, health care workers are another group that was suspected to be at higher risk given close contact with patients, although there have been only three confirmed exposures. Sharps injuries from unroofed lesions are tied to some of those confirmed or suspected cases.

“We do not recommend unroofing lesions,” she said. “We’re getting very good samples from just rigorous swabbing of the lesions.”

She said that the CDC is also monitoring “a few hundred” cases, some of them severe, among people experiencing homelessness.

“We are working to try to understand the exposures that have occurred to those individuals and whether transmission has occurred person-to-person,” Dr. Rao said.

Severe cases among immunocompromised

Also of concern are people with compromised immune systems owing to advanced HIV or organ or stem cell transplants.

Among immunocompromised persons, Dr. Rao said, “we’re seeing large necrotic lesions affecting a large percentage of body surface, lesions that continue to develop over weeks.”

Boghuma Titanji, MD, PhD, MSc, a physician-scientist at Emory University in Atlanta, and an emerging-disease specialist, addressed the difference in presentations between immunocompromised and immunocompetent patients.

She said the main distinction is the extent of the lesions. Patients with AIDS and very low CD4 counts, for instance, are presenting with more lesions and have a longer course of illness.

Dr. Rao said in an interview, “It’s really important to understand someone’s immune status and understand whether they are severely immunocompromised. If there is a concern that a person has monkeypox, also testing for HIV concurrently may be important. It could be a missed opportunity to evaluate for it, especially given the fact that these can occur together.”

Assessing the size and appearance of the lesions is important to understanding whether patients could develop severe infection, she said.

Differences from past epidemics

Dr. Titanji said the current outbreak has some differences from historic outbreaks.

The incubation period, for instance, has tended to be shorter than in previous outbreaks – now 7-10 days, with a range of 5-14 days instead of a range of up to 21 days in previous outbreaks.

There are also more cases of presentations with only single lesions, which were infrequent in past epidemics, she said.

The scope of suspected cases has also broadened, with changing clinical features.

“We have expanded the clinical descriptions to include presentations that involve isolated rectal presentation – individuals presenting solely with rectal pain as the primary manifestation of monkeypox – or presenting with a sore throat as the only manifestation,” she said.

Expanding the case definition will help identify who should be tested.

“Monkeypox is an incredible clinical mimic,” Dr. Titanji said. “The rash can really take the form of a lot of the things we encounter on a regular basis in ID. It’s important to always have a low index of suspicion to test patients when they fit the right epidemiological profile.”

Vaccine strategy has evolved

Brett Petersen, MD, MPH, captain of the U.S. Public Health Service with the CDC, said that Jynneos, licensed by the U.S. Food and Drug Administration, continues to be the primary vaccine for monkeypox. However, the strategy has changed.

Whereas the initial vaccine strategy was to administer the vaccine after known exposure, the guidance now includes vaccinating after “both known and presumed exposures, as described in the eligible populations.”

It’s now been expanded even further to include preexposure inoculations for a wide group of people at greater risk, he explained.

Early data from the CDC indicate that the Jynneos vaccine is effective.

In a report updated in September, the CDC found that among 32 U.S. jurisdictions, monkeypox incidence was much higher among at-risk, unvaccinated people for whom vaccination is recommended than among those who got the Jynneos vaccine.

“Unvaccinated people had 14 times the risk of monkeypox disease compared to people who were vaccinated,” the CDC reported.

Asked about the end goal for monkeypox, Dr. Petersen said, “Our goal should be elimination. I think that is an achievable goal, but it will depend on a lot of factors and a lot of continued public health efforts.”

Dr. Rao, Dr. Titanji, and Dr. Petersen declared no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Who would have thought we would need to refresh our knowledge on polio virus in 2022? Fate seems cruel to add this concern on the heels of SARS-CoV-2, monkeypox, abnormal seasons for RSV, acute flaccid myelitis (AFM) linked to enteroviruses, and a summer of parechovirus causing infant meningitis. But confirmation that indeed an adult had polio with paralytic disease raises concerns among public health groups and ordinary citizens alike, particularly those who remember polio in its heyday.

History: In the summer of 1952, polio was among the most feared diseases on the planet. Families were advised to not allow children to congregate in groups or use public swimming pools; little league baseball games were being canceled and there was talk of not opening schools for the fall. Every parent’s nightmare seemed to be the nonspecific febrile summer illness that led to paralytic sequelae. TV news included videos of the iron lung wards in hospitals across the country. Medical providers felt powerless, only able to give nonspecific preventive advice. There was no specific antiviral (there still isn’t) and vaccines seemed a long way off.

Harrison_Christopher_MO_web.jpg

Then came the news that Dr. Jonas Salk’s group had gotten an inactivated polio vaccine (IPV) approved for general use in 1955. Families were excited to have their children vaccinated. Paralytic polio cases dropped like a rock from approximately 22,000/year in 1952 to approximately 2,200 in 1956. A surge to near 6,000 cases in 1959 led to Dr. Albert Sabin’s oral polio vaccine (OPV), which supplanted IPV in 1961. OPV had the advantages of: 1) Inducing mucosal as well as serum antibodies, 2) more durable responses, and 3) immunity in unvaccinated persons exposed to vaccine virus that had been shed in stools into wastewater and rivers.

By 1964, polio had nearly disappeared. The last wild-type indigenous U.S. case was in 1979. By 1994, all the Americas were declared polio free. Because the only U.S. paralytic polio cases thereafter were foreign imports or were associated with oral vaccine strains (so-called vaccine-associated paralytic polio [VAPP]), OPV was replaced by an enhanced IPV in 2000 to prevent further VAPP.

Polio facts: Polio is asymptomatic in about 70% of infections. Among the 30% with symptoms, paralysis occurs infrequently, with the overall rate of paralytic infections being 0.5% (rate varies by virus type with type 3 having the highest rate).¹ Why then was the world so afraid of polio? If every person in a U.S. birth cohort (about 3.7 million) was unvaccinated and became infected with poliovirus, more than 18,000 would get paralytic polio and almost 1,300 would die. Of note, adults have a higher chance of paralytic polio after infection than children.

Concerns in 2022: Persons vaccinated with at least three doses of either IPV or OPV have historically been protected from paralytic polio (99% protection). But are we sure that the United States remains protected against polio after 2 decades of IPV being the only vaccine? Polio could be reintroduced at any time to the United States from countries with reported cases that likely arose because of low vaccination rates related to war, famine, or political upheavals (Malawi, Mozambique, Nigeria, Pakistan, and Afghanistan).² The proof? The recent confirmed New York case.

International efforts resulted in global eradication of two polio wild-types viruses (type 2 in 2015 and type 3 in 2019). Nevertheless, vaccine-derived, virulent polio virus (VDPV) type 2 and VDPV-3 still circulate in some areas, particularly Africa (VDPV-2) and Israel (VDPV-3). The above-mentioned U.S. case is an unvaccinated adult traveler who went to an area where VDPV-2 circulates and developed disease after returning home.³ So, it was not an indigenous reappearance in the United States and it was not a breakthrough case in a vaccinated person. But it is sobering to realize that all who are unvaccinated remain at risk for paralytic polio in 2022, particularly because vaccination rates declined nearly everywhere during the initial COVID-19 pandemic. We are still catching up, with vaccination rates under 50% in some ZIP codes.⁴

Are VDPVs circulating in some parts of the United States? Interestingly, wastewater surveillance programs may be the most economical and practical way to perform polio surveillance. Such a program detected polio virus in London wastewater in June 2022.⁵ New York has recently detected polio in wastewater during testing begun because of the recent case.⁶

Good news: For paralytic polio, seropositivity at any titer indicates protection, so U.S. serosurveillance data would also be informative. How durable is polio protection in the IPV era? Available data suggest that even though we have used only IPV these past 20 years, seropositivity rates among vaccinees with at least three doses of either IPV or OPV should persist for decades and likely for life. Even before polio became a concern this year, the Centers for Disease Control and Prevention, being proactive, wanted to ensure that the enhanced IPV was producing durable immunity and that persons of all ages remained seropositive to the three polio virus types over 10 years after discontinuing OPV use in 2012.

The CDC collaborated with investigators in Kansas City, Mo., to evaluate titers and seropositivity to all three types in a 2- to 85-year-old otherwise healthy cohort with demographics that mirrored the 2010 census for the Kansas City region, which in turn mirrored the national 2021 census data.⁷ There were approximately 100 persons in each age cohort, with 200 below age 11 years (the cohort that had received only IPV). Serology was performed at the CDC.

Overall seropositivity rates were high, but lower for type 3 (83.3%) and type 2 (90.7%) than type 1 (94.4%). Of note, most of those seronegative for one or more types were among 2- to 3-year-olds who had not completed their full IPV series, with most seronegative results being against polio types 1 and 3. Further, five, who were confirmed as having received no polio vaccine, were seronegative for all three types. Two with no available vaccine records (over 18 years old) were also seronegative for all three types.

So, regardless of the era in which one got polio vaccine, vaccine protection appears to persist indefinitely after three doses. Even 80-year-olds were still seropositive if they had three doses. We can confidently reassure our patients that the vaccine still works; the persons who need to fear polio in 2022 are those who are not vaccinated or have had fewer than three doses, particularly if they travel to areas of persistent polio. Wild type 1 virus persists in a few countries as does VDPV type 2 and VDPV type 3. Importantly, wild type 2 and wild type 3 (with the lowest seropositivity in 2012 study) have been eliminated globally so the only circulating type 2 and type 3 polio virus is VDPV in a few countries. Travel to these countries warrants review of polio vaccine records and CDC or WHO current recommendations for travelers to those countries.
 

Dr. Harrison is a professor, University of Missouri Kansas City School of Medicine, department of medicine, infectious diseases section, Kansas City. Email him at pdnews@mdedge.com.

References

1. Poliomyelitis. World Health Organization fact sheet, 2022 Jul 4..

2. Franco-Paredes C et al. Lancet Infect Dis. 2022 Aug 16. doi: 10.1016/S1473-3099(22)00548-5.

3. Link-Gelles R et al. MMWR Morb Mortal Wkly Rep. 2022 Aug 19;71(33):1065-8.

4. “Polio vaccination rate for 2-year-olds is as low as 37% in parts of N.Y. county where paralysis case was found,” NBC News, Erika Edwards, 2022 Aug 16. 5. Vaccine-derived poliovirus type 2 (VDPV2) detected in environmental samples in London. Polioeradication.org. 2022 Jun 22.

6. “NYSDOH and NYCDOHMH wastewater monitoring identifies polio in New York City and urges unvaccinated New Yorkers to get vaccinated now,” nyc.gov. 2022 Aug 12.

7. Wallace GS et al. Hum Vaccin Immunother. 2017;13(4):776-83.

Who would have thought we would need to refresh our knowledge on polio virus in 2022? Fate seems cruel to add this concern on the heels of SARS-CoV-2, monkeypox, abnormal seasons for RSV, acute flaccid myelitis (AFM) linked to enteroviruses, and a summer of parechovirus causing infant meningitis. But confirmation that indeed an adult had polio with paralytic disease raises concerns among public health groups and ordinary citizens alike, particularly those who remember polio in its heyday.

History: In the summer of 1952, polio was among the most feared diseases on the planet. Families were advised to not allow children to congregate in groups or use public swimming pools; little league baseball games were being canceled and there was talk of not opening schools for the fall. Every parent’s nightmare seemed to be the nonspecific febrile summer illness that led to paralytic sequelae. TV news included videos of the iron lung wards in hospitals across the country. Medical providers felt powerless, only able to give nonspecific preventive advice. There was no specific antiviral (there still isn’t) and vaccines seemed a long way off.

Harrison_Christopher_MO_web.jpg

Then came the news that Dr. Jonas Salk’s group had gotten an inactivated polio vaccine (IPV) approved for general use in 1955. Families were excited to have their children vaccinated. Paralytic polio cases dropped like a rock from approximately 22,000/year in 1952 to approximately 2,200 in 1956. A surge to near 6,000 cases in 1959 led to Dr. Albert Sabin’s oral polio vaccine (OPV), which supplanted IPV in 1961. OPV had the advantages of: 1) Inducing mucosal as well as serum antibodies, 2) more durable responses, and 3) immunity in unvaccinated persons exposed to vaccine virus that had been shed in stools into wastewater and rivers.

By 1964, polio had nearly disappeared. The last wild-type indigenous U.S. case was in 1979. By 1994, all the Americas were declared polio free. Because the only U.S. paralytic polio cases thereafter were foreign imports or were associated with oral vaccine strains (so-called vaccine-associated paralytic polio [VAPP]), OPV was replaced by an enhanced IPV in 2000 to prevent further VAPP.

Polio facts: Polio is asymptomatic in about 70% of infections. Among the 30% with symptoms, paralysis occurs infrequently, with the overall rate of paralytic infections being 0.5% (rate varies by virus type with type 3 having the highest rate).¹ Why then was the world so afraid of polio? If every person in a U.S. birth cohort (about 3.7 million) was unvaccinated and became infected with poliovirus, more than 18,000 would get paralytic polio and almost 1,300 would die. Of note, adults have a higher chance of paralytic polio after infection than children.

Concerns in 2022: Persons vaccinated with at least three doses of either IPV or OPV have historically been protected from paralytic polio (99% protection). But are we sure that the United States remains protected against polio after 2 decades of IPV being the only vaccine? Polio could be reintroduced at any time to the United States from countries with reported cases that likely arose because of low vaccination rates related to war, famine, or political upheavals (Malawi, Mozambique, Nigeria, Pakistan, and Afghanistan).² The proof? The recent confirmed New York case.

International efforts resulted in global eradication of two polio wild-types viruses (type 2 in 2015 and type 3 in 2019). Nevertheless, vaccine-derived, virulent polio virus (VDPV) type 2 and VDPV-3 still circulate in some areas, particularly Africa (VDPV-2) and Israel (VDPV-3). The above-mentioned U.S. case is an unvaccinated adult traveler who went to an area where VDPV-2 circulates and developed disease after returning home.³ So, it was not an indigenous reappearance in the United States and it was not a breakthrough case in a vaccinated person. But it is sobering to realize that all who are unvaccinated remain at risk for paralytic polio in 2022, particularly because vaccination rates declined nearly everywhere during the initial COVID-19 pandemic. We are still catching up, with vaccination rates under 50% in some ZIP codes.⁴

Are VDPVs circulating in some parts of the United States? Interestingly, wastewater surveillance programs may be the most economical and practical way to perform polio surveillance. Such a program detected polio virus in London wastewater in June 2022.⁵ New York has recently detected polio in wastewater during testing begun because of the recent case.⁶

Good news: For paralytic polio, seropositivity at any titer indicates protection, so U.S. serosurveillance data would also be informative. How durable is polio protection in the IPV era? Available data suggest that even though we have used only IPV these past 20 years, seropositivity rates among vaccinees with at least three doses of either IPV or OPV should persist for decades and likely for life. Even before polio became a concern this year, the Centers for Disease Control and Prevention, being proactive, wanted to ensure that the enhanced IPV was producing durable immunity and that persons of all ages remained seropositive to the three polio virus types over 10 years after discontinuing OPV use in 2012.

The CDC collaborated with investigators in Kansas City, Mo., to evaluate titers and seropositivity to all three types in a 2- to 85-year-old otherwise healthy cohort with demographics that mirrored the 2010 census for the Kansas City region, which in turn mirrored the national 2021 census data.⁷ There were approximately 100 persons in each age cohort, with 200 below age 11 years (the cohort that had received only IPV). Serology was performed at the CDC.

Overall seropositivity rates were high, but lower for type 3 (83.3%) and type 2 (90.7%) than type 1 (94.4%). Of note, most of those seronegative for one or more types were among 2- to 3-year-olds who had not completed their full IPV series, with most seronegative results being against polio types 1 and 3. Further, five, who were confirmed as having received no polio vaccine, were seronegative for all three types. Two with no available vaccine records (over 18 years old) were also seronegative for all three types.

So, regardless of the era in which one got polio vaccine, vaccine protection appears to persist indefinitely after three doses. Even 80-year-olds were still seropositive if they had three doses. We can confidently reassure our patients that the vaccine still works; the persons who need to fear polio in 2022 are those who are not vaccinated or have had fewer than three doses, particularly if they travel to areas of persistent polio. Wild type 1 virus persists in a few countries as does VDPV type 2 and VDPV type 3. Importantly, wild type 2 and wild type 3 (with the lowest seropositivity in 2012 study) have been eliminated globally so the only circulating type 2 and type 3 polio virus is VDPV in a few countries. Travel to these countries warrants review of polio vaccine records and CDC or WHO current recommendations for travelers to those countries.
 

Dr. Harrison is a professor, University of Missouri Kansas City School of Medicine, department of medicine, infectious diseases section, Kansas City. Email him at pdnews@mdedge.com.

References

1. Poliomyelitis. World Health Organization fact sheet, 2022 Jul 4..

2. Franco-Paredes C et al. Lancet Infect Dis. 2022 Aug 16. doi: 10.1016/S1473-3099(22)00548-5.

3. Link-Gelles R et al. MMWR Morb Mortal Wkly Rep. 2022 Aug 19;71(33):1065-8.

4. “Polio vaccination rate for 2-year-olds is as low as 37% in parts of N.Y. county where paralysis case was found,” NBC News, Erika Edwards, 2022 Aug 16. 5. Vaccine-derived poliovirus type 2 (VDPV2) detected in environmental samples in London. Polioeradication.org. 2022 Jun 22.

6. “NYSDOH and NYCDOHMH wastewater monitoring identifies polio in New York City and urges unvaccinated New Yorkers to get vaccinated now,” nyc.gov. 2022 Aug 12.

7. Wallace GS et al. Hum Vaccin Immunother. 2017;13(4):776-83.

Who would have thought we would need to refresh our knowledge on polio virus in 2022? Fate seems cruel to add this concern on the heels of SARS-CoV-2, monkeypox, abnormal seasons for RSV, acute flaccid myelitis (AFM) linked to enteroviruses, and a summer of parechovirus causing infant meningitis. But confirmation that indeed an adult had polio with paralytic disease raises concerns among public health groups and ordinary citizens alike, particularly those who remember polio in its heyday.

History: In the summer of 1952, polio was among the most feared diseases on the planet. Families were advised to not allow children to congregate in groups or use public swimming pools; little league baseball games were being canceled and there was talk of not opening schools for the fall. Every parent’s nightmare seemed to be the nonspecific febrile summer illness that led to paralytic sequelae. TV news included videos of the iron lung wards in hospitals across the country. Medical providers felt powerless, only able to give nonspecific preventive advice. There was no specific antiviral (there still isn’t) and vaccines seemed a long way off.

Harrison_Christopher_MO_web.jpg

Then came the news that Dr. Jonas Salk’s group had gotten an inactivated polio vaccine (IPV) approved for general use in 1955. Families were excited to have their children vaccinated. Paralytic polio cases dropped like a rock from approximately 22,000/year in 1952 to approximately 2,200 in 1956. A surge to near 6,000 cases in 1959 led to Dr. Albert Sabin’s oral polio vaccine (OPV), which supplanted IPV in 1961. OPV had the advantages of: 1) Inducing mucosal as well as serum antibodies, 2) more durable responses, and 3) immunity in unvaccinated persons exposed to vaccine virus that had been shed in stools into wastewater and rivers.

By 1964, polio had nearly disappeared. The last wild-type indigenous U.S. case was in 1979. By 1994, all the Americas were declared polio free. Because the only U.S. paralytic polio cases thereafter were foreign imports or were associated with oral vaccine strains (so-called vaccine-associated paralytic polio [VAPP]), OPV was replaced by an enhanced IPV in 2000 to prevent further VAPP.

Polio facts: Polio is asymptomatic in about 70% of infections. Among the 30% with symptoms, paralysis occurs infrequently, with the overall rate of paralytic infections being 0.5% (rate varies by virus type with type 3 having the highest rate).¹ Why then was the world so afraid of polio? If every person in a U.S. birth cohort (about 3.7 million) was unvaccinated and became infected with poliovirus, more than 18,000 would get paralytic polio and almost 1,300 would die. Of note, adults have a higher chance of paralytic polio after infection than children.

Concerns in 2022: Persons vaccinated with at least three doses of either IPV or OPV have historically been protected from paralytic polio (99% protection). But are we sure that the United States remains protected against polio after 2 decades of IPV being the only vaccine? Polio could be reintroduced at any time to the United States from countries with reported cases that likely arose because of low vaccination rates related to war, famine, or political upheavals (Malawi, Mozambique, Nigeria, Pakistan, and Afghanistan).² The proof? The recent confirmed New York case.

International efforts resulted in global eradication of two polio wild-types viruses (type 2 in 2015 and type 3 in 2019). Nevertheless, vaccine-derived, virulent polio virus (VDPV) type 2 and VDPV-3 still circulate in some areas, particularly Africa (VDPV-2) and Israel (VDPV-3). The above-mentioned U.S. case is an unvaccinated adult traveler who went to an area where VDPV-2 circulates and developed disease after returning home.³ So, it was not an indigenous reappearance in the United States and it was not a breakthrough case in a vaccinated person. But it is sobering to realize that all who are unvaccinated remain at risk for paralytic polio in 2022, particularly because vaccination rates declined nearly everywhere during the initial COVID-19 pandemic. We are still catching up, with vaccination rates under 50% in some ZIP codes.⁴

Are VDPVs circulating in some parts of the United States? Interestingly, wastewater surveillance programs may be the most economical and practical way to perform polio surveillance. Such a program detected polio virus in London wastewater in June 2022.⁵ New York has recently detected polio in wastewater during testing begun because of the recent case.⁶

Good news: For paralytic polio, seropositivity at any titer indicates protection, so U.S. serosurveillance data would also be informative. How durable is polio protection in the IPV era? Available data suggest that even though we have used only IPV these past 20 years, seropositivity rates among vaccinees with at least three doses of either IPV or OPV should persist for decades and likely for life. Even before polio became a concern this year, the Centers for Disease Control and Prevention, being proactive, wanted to ensure that the enhanced IPV was producing durable immunity and that persons of all ages remained seropositive to the three polio virus types over 10 years after discontinuing OPV use in 2012.

The CDC collaborated with investigators in Kansas City, Mo., to evaluate titers and seropositivity to all three types in a 2- to 85-year-old otherwise healthy cohort with demographics that mirrored the 2010 census for the Kansas City region, which in turn mirrored the national 2021 census data.⁷ There were approximately 100 persons in each age cohort, with 200 below age 11 years (the cohort that had received only IPV). Serology was performed at the CDC.

Overall seropositivity rates were high, but lower for type 3 (83.3%) and type 2 (90.7%) than type 1 (94.4%). Of note, most of those seronegative for one or more types were among 2- to 3-year-olds who had not completed their full IPV series, with most seronegative results being against polio types 1 and 3. Further, five, who were confirmed as having received no polio vaccine, were seronegative for all three types. Two with no available vaccine records (over 18 years old) were also seronegative for all three types.

So, regardless of the era in which one got polio vaccine, vaccine protection appears to persist indefinitely after three doses. Even 80-year-olds were still seropositive if they had three doses. We can confidently reassure our patients that the vaccine still works; the persons who need to fear polio in 2022 are those who are not vaccinated or have had fewer than three doses, particularly if they travel to areas of persistent polio. Wild type 1 virus persists in a few countries as does VDPV type 2 and VDPV type 3. Importantly, wild type 2 and wild type 3 (with the lowest seropositivity in 2012 study) have been eliminated globally so the only circulating type 2 and type 3 polio virus is VDPV in a few countries. Travel to these countries warrants review of polio vaccine records and CDC or WHO current recommendations for travelers to those countries.
 

Dr. Harrison is a professor, University of Missouri Kansas City School of Medicine, department of medicine, infectious diseases section, Kansas City. Email him at pdnews@mdedge.com.

References

1. Poliomyelitis. World Health Organization fact sheet, 2022 Jul 4..

2. Franco-Paredes C et al. Lancet Infect Dis. 2022 Aug 16. doi: 10.1016/S1473-3099(22)00548-5.

3. Link-Gelles R et al. MMWR Morb Mortal Wkly Rep. 2022 Aug 19;71(33):1065-8.

4. “Polio vaccination rate for 2-year-olds is as low as 37% in parts of N.Y. county where paralysis case was found,” NBC News, Erika Edwards, 2022 Aug 16. 5. Vaccine-derived poliovirus type 2 (VDPV2) detected in environmental samples in London. Polioeradication.org. 2022 Jun 22.

6. “NYSDOH and NYCDOHMH wastewater monitoring identifies polio in New York City and urges unvaccinated New Yorkers to get vaccinated now,” nyc.gov. 2022 Aug 12.

7. Wallace GS et al. Hum Vaccin Immunother. 2017;13(4):776-83.

Monkeypox, COVID, and polio: These three very different diseases have been dominating news cycles recently, but they share at least one common characteristic: some people can become infected – and in turn infect others – while showing no symptoms.

In 1883, the famous bacteriologist Friedrich Loeffler (1852-1915) recognized that an individual’s asymptomatic carriage of bacteria could lead to diphtheria in others. Now, as then, asymptomatically infected people present a conundrum: How do you fight the spread of a disease when you can’t identify some of the people who are spreading it?

“Typhoid Mary” is perhaps the quintessential example of asymptomatic transmission of infections leading to illness and death. At the turn of the 20th century, young Mary Mallon emigrated from Ireland to New York, where she soon became a cook for wealthy Manhattan families.

George Soper, a sanitary engineer, was hired by a stricken family to investigate. After epidemiologic study, he suspected that Mary was a carrier of Salmonella typhi, the bacterial cause of typhoid fever. He persuaded the New York Department of Health to test her – against her will – for infection. After her stool was found to test positive for Salmonella, Mary was forcibly moved to North Brother Island, where she remained largely isolated from others for the next 2 years. In 1910, she was released by a new commissioner after promising not to work as a cook.

However, working under an assumed name, Mary resumed cooking at the Sloane Hospital for Women in Manhattan. Over the next 3 months, at least 25 staff members became ill. Having been found out, Mary was again exiled to the island, where she spent the rest of her life. She died in 1938 after having infected at least 122 people, five of whom died.
 

COVID

Asymptomatic infections are primary drivers of COVID. Earlier in the pandemic, a meta-analysis suggested a 40% rate of asymptomatic infections, although some early reports arrived at lower estimates. A 2021 JAMA Network Open modeling study indicated a 60% rate.

Those rates are changing with the Omicron variants, of which even more cases are asymptomatic. Is this from a mutation in the virus? Some suggest that it is most likely attributable to prior vaccination resulting in boosted immunity and infections being milder. Of concern is that, although people may be asymptomatic, they still have the same viral load in their nose and can readily transmit infection.

Vincent Racaniello, PhD, a professor of virology at Columbia University in New York, told this news organization that “SARS-CoV-2 COVID is so effective at transmitting because it does this asymptomatic transmission. And so you’re out and about; you have no idea that you’re infected. You’re effectively doing what we call community transmission.”

This distinguishes SARS-CoV-2 from SARS-CoV-1. SARS-CoV-1 – which caused the SARS epidemic in 2002–2004 – had very little asymptomatic shedding. With COVID, on the other hand, “A lot of people are infected but never transmit,” Dr. Racaniello added. “I think 80% of transmissions are done by 20% of infected people because those are the ones who are shedding the most virus.”
 

Polio

The August case of paralytic polio in Rockland County, N.Y., is “the first case of polio reported in the United States in nearly 10 years, and only the second instance of community transmission identified in the U.S. since 1979,” a spokesperson for the Centers for Disease Control and Prevention said in an email. “Although no additional cases of polio have been reported at this time, recent wastewater findings elevate concerns that poliovirus is present in these communities, posing a risk to those who are unvaccinated.”

Poliovirus has now been found in the wastewater of New York City and three surrounding counties: Rockland, Orange, and Sullivan.

Unlike COVID, which is spread through air and respiratory secretions, polio has primarily fecal-oral transmission, meaning it is spread by people ingesting food or water contaminated with stool.

According to the World Health Organization, up to 90% of infections are unrecognized because the person has no to minimal symptoms. Symptoms are nonspecific in the remainder. Only a small proportion of those infected go on to develop paralysis.

Paul Offit, MD, a virologist and director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, told this news organization that before widespread immunization, polio “caused 25,000 – 30,000 children every year to be paralyzed and 1,500 to die. Roughly 1 of every 200 children who was infected was paralyzed. We had the inactivated vaccine followed by the oral polio vaccine (OPV). The price that we paid for the OPV was that rarely it could revert to the so-called neurovirulent type, a paralytic type.”

Use of the OPV was discontinued in 2000 in the United States but is still widely used worldwide because it is inexpensive and easier to administer than injections. It appeared that we were close to completely eradicating polio, as we had smallpox, but then vaccine-derived polio virus (VDPV) started cropping up in Africa, the Middle East, and Asia. They are mainly from the type 2 virus, as is the New York case. There have been three other cases of VDPV in the United States since 2000.

Now, Dr. Offit estimates that only 1 in 2,000 of those infected become paralyzed. This is why the CDC and epidemiologists are so concerned about the Rockland patient – that one case of paralysis could represent a large pool of people who are infected with polio and are asymptomatic, continuing to shed infectious virus into the sewage.

The CDC confirmed that it began conducting wastewater testing for polio in August 2022. In their interviews for this article, Dr. Offit and Dr. Racaniello were both critical of this, stressing that it is essential to do wastewater testing nationally, since asymptomatic polio can be expected to crop up from international travelers who have received OPV.

Many countries conduct that kind of wastewater surveillance. Dr. Racaniello was particularly critical of the CDC. “We’ve been telling CDC for years, at least a decade, Why don’t you check the wastewater?,” Dr. Racaniello said, “It’s been known for many years that we should be looking to monitor the circulation of these viruses. So we are using paralysis as a sentinel to say that this virus is in the wastewater, which is just not acceptable!”

Apparently there was some concern that the public would not understand. Dr. Offit viewed it as one more piece of necessary education: “You shouldn’t be alarmed about this as long as you’re vaccinated. If you’re not vaccinated, realize that this is a risk you’re taking.”
 

Monkeypox

Monkeypox cases have been skyrocketing in the United States in recent weeks. More than 18,000 cases have been reported since the first case in Boston on May 19, 2022.

“Monkeypox was such a rare zoonotic disease, and the disease always historically was introduced through animal contact,” Stuart Isaacs, MD, a pox virologist at the University of Pennsylvania, said in an interview. “And then the infected person would have potential spread within the household as the most common human-to-human spread, The sexual transmission is driving a lot of this infection and potentially allowing this to efficiently spread from person to person.”

A recent study from Belgium, available only as a preprint, created concerns about potential asymptomatic transmission of monkeypox Three men had undergone testing for anogenital chlamydia and gonorrhea but showed no clinical signs of monkeypox. The same samples were later tested by polymerase chain reaction (PCR), and their viral load in anorectal swabs was similar to or slightly lower than that of symptomatic patients. While no cultures were done, the patients seroconverted by later antibody testing, confirming infection.

Via email, a CDC spokesperson noted, “At this time, CDC does not have enough data to support transmission from aerosolized virus for the ongoing monkeypox outbreak, or to assess the risks for transmission from asymptomatic people. The data supports the main source of transmission currently as close contact with someone who is infected with monkeypox.”

Dr. Isaacs agreed, saying studies of smallpox, a related orthopox virus, also suggested this.

In the United Kingdom, the Institute of Tropical Medicine is offering PCR testing for monkeypox to all patients who come for gonorrhea/chlamydia screening. Dr. Racaniello said, “I think that would be great to get a sense of who is infected. Then you could look at the results and say what fraction of people go on to develop lesions, and they give you a sense of the asymptomatic rate, which we don’t know at this point.”

Unfortunately, to be tested for monkeypox in the United States requires that the patient have a lesion. “This is part of the dropped ball of public health in the U.S.,” Dr. Racaniello said. “We’re not thinking about this. .... We need to be doing [infectivity] experiments. So then the question is, how much infectious virus do you need to transmit?”
 

Conclusion

We’ve seen that asymptomatic carriage of bacteria and viruses occurs readily with typhoid, COVID, diphtheria, and polio (among many other organisms, such as methicillin-resistant Staphylococcus aureus or group A strep) and is far less likely with monkeypox.

Two common denominators emerged from these interviews. The first and biggest hurdle is identifying asymptomatic carriers, which is hampered by the politicization of the CDC and funding cuts to public health. “It used to be the CDC was all about public health, and now it’s administrators, unfortunately,” said Dr. Racaniello, citing science writer Laurie Garrett, author of the influential 1994 book, “The Coming Plague”.

We don’t conduct proper surveillance, he pointed out. Wastewater surveillance has been neglected for more than a decade. It has been used for SARS-CoV-2 but is only now being initiated for polio and monkeypox. Norovirus testing would also be especially helpful in reducing foodborne outbreaks, Dr. Racaniello suggested.

The second common denominator is the need to increase the availability and uptake of vaccines. As Dr. Racaniello said about COVID, “The virus is here to stay. It’s never going to go away. It’s in humans. It’s in a lot of animals. So we’re stuck with it. We’re going to have outbreaks every year. So what do you do? Get vaccinated.” And he added, “Vaccination is the most important strategy to go on with our lives.”

Dr. Isaacs was a bit more tempered, not wanting to oversell the vaccine. He said, “The vaccine is just part of the toolkit,” which includes education, testing, isolation, and reducing risk, all of which decrease the transmission cycles.

Speaking of how antivaccine advocates had specifically targeted the Hasidic community in New York State’s Rockland County, Dr. Offit noted, “I don’t think it’s a knowledge deficit as much as a trust deficit.” He said officials should identify people in communities such as these who are trusted and have them become the influencers.

The final major hurdle to controlling these outbreaks remains global disparities in care. Monkeypox has been endemic in Nigeria for decades. It was only when it spread to Europe and America that it received attention. Polio has been actively circulating in Africa and the Middle East but is only getting attention because of the New York case.

Africa was unable to afford COVID vaccines until recently. While many in the United States are on their fourth booster, as of December 2021, more than 80% of people in Africa had not yet received a single dose, according to an article by Munyaradzi Makoni in The Lancet Respiratory Medicine.

Echoing Dr. Peter Hotez’s long-standing plea for “vaccine diplomacy,” Dr. Racaniello concluded, “My philosophy has always been we should give [vaccines] to them. I mean, we spend trillions on guns. Can’t we spend a few hundred million on vaccines? We should give away everything in terms of medicine to countries that need it, and people would like us a lot better than they do now. I think it would be such a great way of getting countries to like us. … So what if it costs a billion dollars a year? It’s a drop in the bucket for us.”

Given globalization, an infectious outbreak anywhere is a risk to all.

Dr. Racaniello and Dr. Offit report no relevant financial relationships. Dr. Isaacs receives royalties from UpToDate.

A version of this article first appeared on Medscape.com.

Monkeypox, COVID, and polio: These three very different diseases have been dominating news cycles recently, but they share at least one common characteristic: some people can become infected – and in turn infect others – while showing no symptoms.

In 1883, the famous bacteriologist Friedrich Loeffler (1852-1915) recognized that an individual’s asymptomatic carriage of bacteria could lead to diphtheria in others. Now, as then, asymptomatically infected people present a conundrum: How do you fight the spread of a disease when you can’t identify some of the people who are spreading it?

“Typhoid Mary” is perhaps the quintessential example of asymptomatic transmission of infections leading to illness and death. At the turn of the 20th century, young Mary Mallon emigrated from Ireland to New York, where she soon became a cook for wealthy Manhattan families.

George Soper, a sanitary engineer, was hired by a stricken family to investigate. After epidemiologic study, he suspected that Mary was a carrier of Salmonella typhi, the bacterial cause of typhoid fever. He persuaded the New York Department of Health to test her – against her will – for infection. After her stool was found to test positive for Salmonella, Mary was forcibly moved to North Brother Island, where she remained largely isolated from others for the next 2 years. In 1910, she was released by a new commissioner after promising not to work as a cook.

However, working under an assumed name, Mary resumed cooking at the Sloane Hospital for Women in Manhattan. Over the next 3 months, at least 25 staff members became ill. Having been found out, Mary was again exiled to the island, where she spent the rest of her life. She died in 1938 after having infected at least 122 people, five of whom died.
 

COVID

Asymptomatic infections are primary drivers of COVID. Earlier in the pandemic, a meta-analysis suggested a 40% rate of asymptomatic infections, although some early reports arrived at lower estimates. A 2021 JAMA Network Open modeling study indicated a 60% rate.

Those rates are changing with the Omicron variants, of which even more cases are asymptomatic. Is this from a mutation in the virus? Some suggest that it is most likely attributable to prior vaccination resulting in boosted immunity and infections being milder. Of concern is that, although people may be asymptomatic, they still have the same viral load in their nose and can readily transmit infection.

Vincent Racaniello, PhD, a professor of virology at Columbia University in New York, told this news organization that “SARS-CoV-2 COVID is so effective at transmitting because it does this asymptomatic transmission. And so you’re out and about; you have no idea that you’re infected. You’re effectively doing what we call community transmission.”

This distinguishes SARS-CoV-2 from SARS-CoV-1. SARS-CoV-1 – which caused the SARS epidemic in 2002–2004 – had very little asymptomatic shedding. With COVID, on the other hand, “A lot of people are infected but never transmit,” Dr. Racaniello added. “I think 80% of transmissions are done by 20% of infected people because those are the ones who are shedding the most virus.”
 

Polio

The August case of paralytic polio in Rockland County, N.Y., is “the first case of polio reported in the United States in nearly 10 years, and only the second instance of community transmission identified in the U.S. since 1979,” a spokesperson for the Centers for Disease Control and Prevention said in an email. “Although no additional cases of polio have been reported at this time, recent wastewater findings elevate concerns that poliovirus is present in these communities, posing a risk to those who are unvaccinated.”

Poliovirus has now been found in the wastewater of New York City and three surrounding counties: Rockland, Orange, and Sullivan.

Unlike COVID, which is spread through air and respiratory secretions, polio has primarily fecal-oral transmission, meaning it is spread by people ingesting food or water contaminated with stool.

According to the World Health Organization, up to 90% of infections are unrecognized because the person has no to minimal symptoms. Symptoms are nonspecific in the remainder. Only a small proportion of those infected go on to develop paralysis.

Paul Offit, MD, a virologist and director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, told this news organization that before widespread immunization, polio “caused 25,000 – 30,000 children every year to be paralyzed and 1,500 to die. Roughly 1 of every 200 children who was infected was paralyzed. We had the inactivated vaccine followed by the oral polio vaccine (OPV). The price that we paid for the OPV was that rarely it could revert to the so-called neurovirulent type, a paralytic type.”

Use of the OPV was discontinued in 2000 in the United States but is still widely used worldwide because it is inexpensive and easier to administer than injections. It appeared that we were close to completely eradicating polio, as we had smallpox, but then vaccine-derived polio virus (VDPV) started cropping up in Africa, the Middle East, and Asia. They are mainly from the type 2 virus, as is the New York case. There have been three other cases of VDPV in the United States since 2000.

Now, Dr. Offit estimates that only 1 in 2,000 of those infected become paralyzed. This is why the CDC and epidemiologists are so concerned about the Rockland patient – that one case of paralysis could represent a large pool of people who are infected with polio and are asymptomatic, continuing to shed infectious virus into the sewage.

The CDC confirmed that it began conducting wastewater testing for polio in August 2022. In their interviews for this article, Dr. Offit and Dr. Racaniello were both critical of this, stressing that it is essential to do wastewater testing nationally, since asymptomatic polio can be expected to crop up from international travelers who have received OPV.

Many countries conduct that kind of wastewater surveillance. Dr. Racaniello was particularly critical of the CDC. “We’ve been telling CDC for years, at least a decade, Why don’t you check the wastewater?,” Dr. Racaniello said, “It’s been known for many years that we should be looking to monitor the circulation of these viruses. So we are using paralysis as a sentinel to say that this virus is in the wastewater, which is just not acceptable!”

Apparently there was some concern that the public would not understand. Dr. Offit viewed it as one more piece of necessary education: “You shouldn’t be alarmed about this as long as you’re vaccinated. If you’re not vaccinated, realize that this is a risk you’re taking.”
 

Monkeypox

Monkeypox cases have been skyrocketing in the United States in recent weeks. More than 18,000 cases have been reported since the first case in Boston on May 19, 2022.

“Monkeypox was such a rare zoonotic disease, and the disease always historically was introduced through animal contact,” Stuart Isaacs, MD, a pox virologist at the University of Pennsylvania, said in an interview. “And then the infected person would have potential spread within the household as the most common human-to-human spread, The sexual transmission is driving a lot of this infection and potentially allowing this to efficiently spread from person to person.”

A recent study from Belgium, available only as a preprint, created concerns about potential asymptomatic transmission of monkeypox Three men had undergone testing for anogenital chlamydia and gonorrhea but showed no clinical signs of monkeypox. The same samples were later tested by polymerase chain reaction (PCR), and their viral load in anorectal swabs was similar to or slightly lower than that of symptomatic patients. While no cultures were done, the patients seroconverted by later antibody testing, confirming infection.

Via email, a CDC spokesperson noted, “At this time, CDC does not have enough data to support transmission from aerosolized virus for the ongoing monkeypox outbreak, or to assess the risks for transmission from asymptomatic people. The data supports the main source of transmission currently as close contact with someone who is infected with monkeypox.”

Dr. Isaacs agreed, saying studies of smallpox, a related orthopox virus, also suggested this.

In the United Kingdom, the Institute of Tropical Medicine is offering PCR testing for monkeypox to all patients who come for gonorrhea/chlamydia screening. Dr. Racaniello said, “I think that would be great to get a sense of who is infected. Then you could look at the results and say what fraction of people go on to develop lesions, and they give you a sense of the asymptomatic rate, which we don’t know at this point.”

Unfortunately, to be tested for monkeypox in the United States requires that the patient have a lesion. “This is part of the dropped ball of public health in the U.S.,” Dr. Racaniello said. “We’re not thinking about this. .... We need to be doing [infectivity] experiments. So then the question is, how much infectious virus do you need to transmit?”
 

Conclusion

We’ve seen that asymptomatic carriage of bacteria and viruses occurs readily with typhoid, COVID, diphtheria, and polio (among many other organisms, such as methicillin-resistant Staphylococcus aureus or group A strep) and is far less likely with monkeypox.

Two common denominators emerged from these interviews. The first and biggest hurdle is identifying asymptomatic carriers, which is hampered by the politicization of the CDC and funding cuts to public health. “It used to be the CDC was all about public health, and now it’s administrators, unfortunately,” said Dr. Racaniello, citing science writer Laurie Garrett, author of the influential 1994 book, “The Coming Plague”.

We don’t conduct proper surveillance, he pointed out. Wastewater surveillance has been neglected for more than a decade. It has been used for SARS-CoV-2 but is only now being initiated for polio and monkeypox. Norovirus testing would also be especially helpful in reducing foodborne outbreaks, Dr. Racaniello suggested.

The second common denominator is the need to increase the availability and uptake of vaccines. As Dr. Racaniello said about COVID, “The virus is here to stay. It’s never going to go away. It’s in humans. It’s in a lot of animals. So we’re stuck with it. We’re going to have outbreaks every year. So what do you do? Get vaccinated.” And he added, “Vaccination is the most important strategy to go on with our lives.”

Dr. Isaacs was a bit more tempered, not wanting to oversell the vaccine. He said, “The vaccine is just part of the toolkit,” which includes education, testing, isolation, and reducing risk, all of which decrease the transmission cycles.

Speaking of how antivaccine advocates had specifically targeted the Hasidic community in New York State’s Rockland County, Dr. Offit noted, “I don’t think it’s a knowledge deficit as much as a trust deficit.” He said officials should identify people in communities such as these who are trusted and have them become the influencers.

The final major hurdle to controlling these outbreaks remains global disparities in care. Monkeypox has been endemic in Nigeria for decades. It was only when it spread to Europe and America that it received attention. Polio has been actively circulating in Africa and the Middle East but is only getting attention because of the New York case.

Africa was unable to afford COVID vaccines until recently. While many in the United States are on their fourth booster, as of December 2021, more than 80% of people in Africa had not yet received a single dose, according to an article by Munyaradzi Makoni in The Lancet Respiratory Medicine.

Echoing Dr. Peter Hotez’s long-standing plea for “vaccine diplomacy,” Dr. Racaniello concluded, “My philosophy has always been we should give [vaccines] to them. I mean, we spend trillions on guns. Can’t we spend a few hundred million on vaccines? We should give away everything in terms of medicine to countries that need it, and people would like us a lot better than they do now. I think it would be such a great way of getting countries to like us. … So what if it costs a billion dollars a year? It’s a drop in the bucket for us.”

Given globalization, an infectious outbreak anywhere is a risk to all.

Dr. Racaniello and Dr. Offit report no relevant financial relationships. Dr. Isaacs receives royalties from UpToDate.

A version of this article first appeared on Medscape.com.

Monkeypox, COVID, and polio: These three very different diseases have been dominating news cycles recently, but they share at least one common characteristic: some people can become infected – and in turn infect others – while showing no symptoms.

In 1883, the famous bacteriologist Friedrich Loeffler (1852-1915) recognized that an individual’s asymptomatic carriage of bacteria could lead to diphtheria in others. Now, as then, asymptomatically infected people present a conundrum: How do you fight the spread of a disease when you can’t identify some of the people who are spreading it?

“Typhoid Mary” is perhaps the quintessential example of asymptomatic transmission of infections leading to illness and death. At the turn of the 20th century, young Mary Mallon emigrated from Ireland to New York, where she soon became a cook for wealthy Manhattan families.

George Soper, a sanitary engineer, was hired by a stricken family to investigate. After epidemiologic study, he suspected that Mary was a carrier of Salmonella typhi, the bacterial cause of typhoid fever. He persuaded the New York Department of Health to test her – against her will – for infection. After her stool was found to test positive for Salmonella, Mary was forcibly moved to North Brother Island, where she remained largely isolated from others for the next 2 years. In 1910, she was released by a new commissioner after promising not to work as a cook.

However, working under an assumed name, Mary resumed cooking at the Sloane Hospital for Women in Manhattan. Over the next 3 months, at least 25 staff members became ill. Having been found out, Mary was again exiled to the island, where she spent the rest of her life. She died in 1938 after having infected at least 122 people, five of whom died.
 

COVID

Asymptomatic infections are primary drivers of COVID. Earlier in the pandemic, a meta-analysis suggested a 40% rate of asymptomatic infections, although some early reports arrived at lower estimates. A 2021 JAMA Network Open modeling study indicated a 60% rate.

Those rates are changing with the Omicron variants, of which even more cases are asymptomatic. Is this from a mutation in the virus? Some suggest that it is most likely attributable to prior vaccination resulting in boosted immunity and infections being milder. Of concern is that, although people may be asymptomatic, they still have the same viral load in their nose and can readily transmit infection.

Vincent Racaniello, PhD, a professor of virology at Columbia University in New York, told this news organization that “SARS-CoV-2 COVID is so effective at transmitting because it does this asymptomatic transmission. And so you’re out and about; you have no idea that you’re infected. You’re effectively doing what we call community transmission.”

This distinguishes SARS-CoV-2 from SARS-CoV-1. SARS-CoV-1 – which caused the SARS epidemic in 2002–2004 – had very little asymptomatic shedding. With COVID, on the other hand, “A lot of people are infected but never transmit,” Dr. Racaniello added. “I think 80% of transmissions are done by 20% of infected people because those are the ones who are shedding the most virus.”
 

Polio

The August case of paralytic polio in Rockland County, N.Y., is “the first case of polio reported in the United States in nearly 10 years, and only the second instance of community transmission identified in the U.S. since 1979,” a spokesperson for the Centers for Disease Control and Prevention said in an email. “Although no additional cases of polio have been reported at this time, recent wastewater findings elevate concerns that poliovirus is present in these communities, posing a risk to those who are unvaccinated.”

Poliovirus has now been found in the wastewater of New York City and three surrounding counties: Rockland, Orange, and Sullivan.

Unlike COVID, which is spread through air and respiratory secretions, polio has primarily fecal-oral transmission, meaning it is spread by people ingesting food or water contaminated with stool.

According to the World Health Organization, up to 90% of infections are unrecognized because the person has no to minimal symptoms. Symptoms are nonspecific in the remainder. Only a small proportion of those infected go on to develop paralysis.

Paul Offit, MD, a virologist and director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, told this news organization that before widespread immunization, polio “caused 25,000 – 30,000 children every year to be paralyzed and 1,500 to die. Roughly 1 of every 200 children who was infected was paralyzed. We had the inactivated vaccine followed by the oral polio vaccine (OPV). The price that we paid for the OPV was that rarely it could revert to the so-called neurovirulent type, a paralytic type.”

Use of the OPV was discontinued in 2000 in the United States but is still widely used worldwide because it is inexpensive and easier to administer than injections. It appeared that we were close to completely eradicating polio, as we had smallpox, but then vaccine-derived polio virus (VDPV) started cropping up in Africa, the Middle East, and Asia. They are mainly from the type 2 virus, as is the New York case. There have been three other cases of VDPV in the United States since 2000.

Now, Dr. Offit estimates that only 1 in 2,000 of those infected become paralyzed. This is why the CDC and epidemiologists are so concerned about the Rockland patient – that one case of paralysis could represent a large pool of people who are infected with polio and are asymptomatic, continuing to shed infectious virus into the sewage.

The CDC confirmed that it began conducting wastewater testing for polio in August 2022. In their interviews for this article, Dr. Offit and Dr. Racaniello were both critical of this, stressing that it is essential to do wastewater testing nationally, since asymptomatic polio can be expected to crop up from international travelers who have received OPV.

Many countries conduct that kind of wastewater surveillance. Dr. Racaniello was particularly critical of the CDC. “We’ve been telling CDC for years, at least a decade, Why don’t you check the wastewater?,” Dr. Racaniello said, “It’s been known for many years that we should be looking to monitor the circulation of these viruses. So we are using paralysis as a sentinel to say that this virus is in the wastewater, which is just not acceptable!”

Apparently there was some concern that the public would not understand. Dr. Offit viewed it as one more piece of necessary education: “You shouldn’t be alarmed about this as long as you’re vaccinated. If you’re not vaccinated, realize that this is a risk you’re taking.”
 

Monkeypox

Monkeypox cases have been skyrocketing in the United States in recent weeks. More than 18,000 cases have been reported since the first case in Boston on May 19, 2022.

“Monkeypox was such a rare zoonotic disease, and the disease always historically was introduced through animal contact,” Stuart Isaacs, MD, a pox virologist at the University of Pennsylvania, said in an interview. “And then the infected person would have potential spread within the household as the most common human-to-human spread, The sexual transmission is driving a lot of this infection and potentially allowing this to efficiently spread from person to person.”

A recent study from Belgium, available only as a preprint, created concerns about potential asymptomatic transmission of monkeypox Three men had undergone testing for anogenital chlamydia and gonorrhea but showed no clinical signs of monkeypox. The same samples were later tested by polymerase chain reaction (PCR), and their viral load in anorectal swabs was similar to or slightly lower than that of symptomatic patients. While no cultures were done, the patients seroconverted by later antibody testing, confirming infection.

Via email, a CDC spokesperson noted, “At this time, CDC does not have enough data to support transmission from aerosolized virus for the ongoing monkeypox outbreak, or to assess the risks for transmission from asymptomatic people. The data supports the main source of transmission currently as close contact with someone who is infected with monkeypox.”

Dr. Isaacs agreed, saying studies of smallpox, a related orthopox virus, also suggested this.

In the United Kingdom, the Institute of Tropical Medicine is offering PCR testing for monkeypox to all patients who come for gonorrhea/chlamydia screening. Dr. Racaniello said, “I think that would be great to get a sense of who is infected. Then you could look at the results and say what fraction of people go on to develop lesions, and they give you a sense of the asymptomatic rate, which we don’t know at this point.”

Unfortunately, to be tested for monkeypox in the United States requires that the patient have a lesion. “This is part of the dropped ball of public health in the U.S.,” Dr. Racaniello said. “We’re not thinking about this. .... We need to be doing [infectivity] experiments. So then the question is, how much infectious virus do you need to transmit?”
 

Conclusion

We’ve seen that asymptomatic carriage of bacteria and viruses occurs readily with typhoid, COVID, diphtheria, and polio (among many other organisms, such as methicillin-resistant Staphylococcus aureus or group A strep) and is far less likely with monkeypox.

Two common denominators emerged from these interviews. The first and biggest hurdle is identifying asymptomatic carriers, which is hampered by the politicization of the CDC and funding cuts to public health. “It used to be the CDC was all about public health, and now it’s administrators, unfortunately,” said Dr. Racaniello, citing science writer Laurie Garrett, author of the influential 1994 book, “The Coming Plague”.

We don’t conduct proper surveillance, he pointed out. Wastewater surveillance has been neglected for more than a decade. It has been used for SARS-CoV-2 but is only now being initiated for polio and monkeypox. Norovirus testing would also be especially helpful in reducing foodborne outbreaks, Dr. Racaniello suggested.

The second common denominator is the need to increase the availability and uptake of vaccines. As Dr. Racaniello said about COVID, “The virus is here to stay. It’s never going to go away. It’s in humans. It’s in a lot of animals. So we’re stuck with it. We’re going to have outbreaks every year. So what do you do? Get vaccinated.” And he added, “Vaccination is the most important strategy to go on with our lives.”

Dr. Isaacs was a bit more tempered, not wanting to oversell the vaccine. He said, “The vaccine is just part of the toolkit,” which includes education, testing, isolation, and reducing risk, all of which decrease the transmission cycles.

Speaking of how antivaccine advocates had specifically targeted the Hasidic community in New York State’s Rockland County, Dr. Offit noted, “I don’t think it’s a knowledge deficit as much as a trust deficit.” He said officials should identify people in communities such as these who are trusted and have them become the influencers.

The final major hurdle to controlling these outbreaks remains global disparities in care. Monkeypox has been endemic in Nigeria for decades. It was only when it spread to Europe and America that it received attention. Polio has been actively circulating in Africa and the Middle East but is only getting attention because of the New York case.

Africa was unable to afford COVID vaccines until recently. While many in the United States are on their fourth booster, as of December 2021, more than 80% of people in Africa had not yet received a single dose, according to an article by Munyaradzi Makoni in The Lancet Respiratory Medicine.

Echoing Dr. Peter Hotez’s long-standing plea for “vaccine diplomacy,” Dr. Racaniello concluded, “My philosophy has always been we should give [vaccines] to them. I mean, we spend trillions on guns. Can’t we spend a few hundred million on vaccines? We should give away everything in terms of medicine to countries that need it, and people would like us a lot better than they do now. I think it would be such a great way of getting countries to like us. … So what if it costs a billion dollars a year? It’s a drop in the bucket for us.”

Given globalization, an infectious outbreak anywhere is a risk to all.

Dr. Racaniello and Dr. Offit report no relevant financial relationships. Dr. Isaacs receives royalties from UpToDate.

A version of this article first appeared on Medscape.com.

Health charities called for action to address racial health disparities after population-wide analysis by the UK Health Security Agency found that Black and Asian neonates had a significantly higher risk of early-onset group B streptococcal disease (GBS), compared with White infants.

One support group said more research was now needed to identify the cause of the disparity, and called for pregnant women to be better informed about the disease and what it could mean for them and their baby.

The study, published in Pediatrics, used UKHSA data on laboratory-confirmed infant group B streptococcal (iGBS) disease cases between Jan. 1, 2016, and Dec. 31, 2020, and were linked to hospital ethnicity records.

Cases of iGBS were defined as isolation of Streptococcus agalactiae from a normally sterile site at 0-6 days of life for early-onset iGBS and 7-90 days for late-onset disease.
 

Hospital data and parent-reported ethnicity

Researchers found 2,512 iGBS cases in England during the study period, 65.3% were early onset and 34.8% late onset, equivalent to 0.52 and 0.28 cases per 1000 live births respectively.

Researchers were able to link 85.6% of those to ethnicity. Among those 2,149 cases, Black infants had a 48% higher risk, and Asian infants a 40% higher risk of early onset iGBS, compared with White infants. Among those from an Asian background, the risk was 87% higher for Bangladeshi and 38% higher for Pakistani neonates.

Rates of early onset iGBS per 1,000 live births were 0.43 for White infants, 0.63 for Black infants, and 0.60 for those of Asian ethnicity.

In contrast, Indian infants had an early-onset rate of 0.47 per 1,000 live births, which was similar to White infants.

Black infants had 57% higher rates of late-onset iGBS (0.37) than White infants (0.24), the researchers reported.

The study authors highlighted previous research which found higher prevalence of group B streptococcal colonization in mothers from Black and some Asian ethnic groups, but lower prevalence in mothers from the Indian subcontinent. More research was needed to establish causes, the researchers said, including whether higher preterm birth rates in minority ethnic groups led to increased iGBS risk in neonates, or whether maternal group B streptococcal disease led to higher preterm birth rates and subsequent neonatal iGBS.

The researchers concluded: “Understanding the factors underpinning differences in rates of early-onset iGBS within south Asian groups in England may lead to new opportunities for prevention such as prioritized antenatal screening. Strategies to prevent neonatal iGBS must be tailored from high-quality quantitative and qualitative data to reach all women and protect all infants, irrespective of racial or ethnic background.”
 

‘Shocking but not surprising’

Commenting on the study, Edward Morris, president of the Royal College of Obstetricians and Gynaecologists, said: “This research is striking reading, and is yet another example of how far we have to go to tackle health inequalities within women’s health care.”

Philip Steer, professor emeritus at Imperial College London, said that the results were “consistent with previous reports of higher GBS carriage and higher maternal and neonatal mortality rates in minority groups” and “emphasize the importance of studying not just whether, but why, these differences exist.” He added: “We need to understand the reasons for the differences before we can design much-needed intervention to eliminate them.”

Jane Plumb, chief executive of Group B Strep Support, called the findings “shocking, but unfortunately not surprising” and said that they offered “another example of racial disparities in maternal and neonatal health.” She said: “We’re calling for all pregnant women and birthing people to be informed about GBS and its risks, so they can make empowered choices for themselves and their baby. It is also critical that trusts sign up to take part in the internationally significant [National Institute for Health and Care Research]–funded GBS3 clinical trial, designed to improve the prevention of GBS infection.”

Baroness Shaista Gohir, chief executive of the Muslim Women’s Network, said: “With significantly higher rates of group B Strep infection in Black and Asian babies, greater efforts must be made to improve awareness among pregnant women within these communities.”

A version of this article first appeared on Medscape UK.

Health charities called for action to address racial health disparities after population-wide analysis by the UK Health Security Agency found that Black and Asian neonates had a significantly higher risk of early-onset group B streptococcal disease (GBS), compared with White infants.

One support group said more research was now needed to identify the cause of the disparity, and called for pregnant women to be better informed about the disease and what it could mean for them and their baby.

The study, published in Pediatrics, used UKHSA data on laboratory-confirmed infant group B streptococcal (iGBS) disease cases between Jan. 1, 2016, and Dec. 31, 2020, and were linked to hospital ethnicity records.

Cases of iGBS were defined as isolation of Streptococcus agalactiae from a normally sterile site at 0-6 days of life for early-onset iGBS and 7-90 days for late-onset disease.
 

Hospital data and parent-reported ethnicity

Researchers found 2,512 iGBS cases in England during the study period, 65.3% were early onset and 34.8% late onset, equivalent to 0.52 and 0.28 cases per 1000 live births respectively.

Researchers were able to link 85.6% of those to ethnicity. Among those 2,149 cases, Black infants had a 48% higher risk, and Asian infants a 40% higher risk of early onset iGBS, compared with White infants. Among those from an Asian background, the risk was 87% higher for Bangladeshi and 38% higher for Pakistani neonates.

Rates of early onset iGBS per 1,000 live births were 0.43 for White infants, 0.63 for Black infants, and 0.60 for those of Asian ethnicity.

In contrast, Indian infants had an early-onset rate of 0.47 per 1,000 live births, which was similar to White infants.

Black infants had 57% higher rates of late-onset iGBS (0.37) than White infants (0.24), the researchers reported.

The study authors highlighted previous research which found higher prevalence of group B streptococcal colonization in mothers from Black and some Asian ethnic groups, but lower prevalence in mothers from the Indian subcontinent. More research was needed to establish causes, the researchers said, including whether higher preterm birth rates in minority ethnic groups led to increased iGBS risk in neonates, or whether maternal group B streptococcal disease led to higher preterm birth rates and subsequent neonatal iGBS.

The researchers concluded: “Understanding the factors underpinning differences in rates of early-onset iGBS within south Asian groups in England may lead to new opportunities for prevention such as prioritized antenatal screening. Strategies to prevent neonatal iGBS must be tailored from high-quality quantitative and qualitative data to reach all women and protect all infants, irrespective of racial or ethnic background.”
 

‘Shocking but not surprising’

Commenting on the study, Edward Morris, president of the Royal College of Obstetricians and Gynaecologists, said: “This research is striking reading, and is yet another example of how far we have to go to tackle health inequalities within women’s health care.”

Philip Steer, professor emeritus at Imperial College London, said that the results were “consistent with previous reports of higher GBS carriage and higher maternal and neonatal mortality rates in minority groups” and “emphasize the importance of studying not just whether, but why, these differences exist.” He added: “We need to understand the reasons for the differences before we can design much-needed intervention to eliminate them.”

Jane Plumb, chief executive of Group B Strep Support, called the findings “shocking, but unfortunately not surprising” and said that they offered “another example of racial disparities in maternal and neonatal health.” She said: “We’re calling for all pregnant women and birthing people to be informed about GBS and its risks, so they can make empowered choices for themselves and their baby. It is also critical that trusts sign up to take part in the internationally significant [National Institute for Health and Care Research]–funded GBS3 clinical trial, designed to improve the prevention of GBS infection.”

Baroness Shaista Gohir, chief executive of the Muslim Women’s Network, said: “With significantly higher rates of group B Strep infection in Black and Asian babies, greater efforts must be made to improve awareness among pregnant women within these communities.”

A version of this article first appeared on Medscape UK.

Health charities called for action to address racial health disparities after population-wide analysis by the UK Health Security Agency found that Black and Asian neonates had a significantly higher risk of early-onset group B streptococcal disease (GBS), compared with White infants.

One support group said more research was now needed to identify the cause of the disparity, and called for pregnant women to be better informed about the disease and what it could mean for them and their baby.

The study, published in Pediatrics, used UKHSA data on laboratory-confirmed infant group B streptococcal (iGBS) disease cases between Jan. 1, 2016, and Dec. 31, 2020, and were linked to hospital ethnicity records.

Cases of iGBS were defined as isolation of Streptococcus agalactiae from a normally sterile site at 0-6 days of life for early-onset iGBS and 7-90 days for late-onset disease.
 

Hospital data and parent-reported ethnicity

Researchers found 2,512 iGBS cases in England during the study period, 65.3% were early onset and 34.8% late onset, equivalent to 0.52 and 0.28 cases per 1000 live births respectively.

Researchers were able to link 85.6% of those to ethnicity. Among those 2,149 cases, Black infants had a 48% higher risk, and Asian infants a 40% higher risk of early onset iGBS, compared with White infants. Among those from an Asian background, the risk was 87% higher for Bangladeshi and 38% higher for Pakistani neonates.

Rates of early onset iGBS per 1,000 live births were 0.43 for White infants, 0.63 for Black infants, and 0.60 for those of Asian ethnicity.

In contrast, Indian infants had an early-onset rate of 0.47 per 1,000 live births, which was similar to White infants.

Black infants had 57% higher rates of late-onset iGBS (0.37) than White infants (0.24), the researchers reported.

The study authors highlighted previous research which found higher prevalence of group B streptococcal colonization in mothers from Black and some Asian ethnic groups, but lower prevalence in mothers from the Indian subcontinent. More research was needed to establish causes, the researchers said, including whether higher preterm birth rates in minority ethnic groups led to increased iGBS risk in neonates, or whether maternal group B streptococcal disease led to higher preterm birth rates and subsequent neonatal iGBS.

The researchers concluded: “Understanding the factors underpinning differences in rates of early-onset iGBS within south Asian groups in England may lead to new opportunities for prevention such as prioritized antenatal screening. Strategies to prevent neonatal iGBS must be tailored from high-quality quantitative and qualitative data to reach all women and protect all infants, irrespective of racial or ethnic background.”
 

‘Shocking but not surprising’

Commenting on the study, Edward Morris, president of the Royal College of Obstetricians and Gynaecologists, said: “This research is striking reading, and is yet another example of how far we have to go to tackle health inequalities within women’s health care.”

Philip Steer, professor emeritus at Imperial College London, said that the results were “consistent with previous reports of higher GBS carriage and higher maternal and neonatal mortality rates in minority groups” and “emphasize the importance of studying not just whether, but why, these differences exist.” He added: “We need to understand the reasons for the differences before we can design much-needed intervention to eliminate them.”

Jane Plumb, chief executive of Group B Strep Support, called the findings “shocking, but unfortunately not surprising” and said that they offered “another example of racial disparities in maternal and neonatal health.” She said: “We’re calling for all pregnant women and birthing people to be informed about GBS and its risks, so they can make empowered choices for themselves and their baby. It is also critical that trusts sign up to take part in the internationally significant [National Institute for Health and Care Research]–funded GBS3 clinical trial, designed to improve the prevention of GBS infection.”

Baroness Shaista Gohir, chief executive of the Muslim Women’s Network, said: “With significantly higher rates of group B Strep infection in Black and Asian babies, greater efforts must be made to improve awareness among pregnant women within these communities.”

A version of this article first appeared on Medscape UK.

The United States has now recorded more than 10,000 confirmed monkeypox cases, according to data released by the Centers for Disease Control and Prevention.

The United States passed the 10,000 mark on Aug. 10, with the number climbing to 10,768 by the morning of Aug. 12, according to the latest CDC data. Monkeypox cases have been found in every state except Wyoming. New York (2,187), California (1,892), and Florida (1,053) have reported the most cases. So far, no monkeypox deaths have been reported in the United States.

The numbers are increasing, with 1,391 cases reported in the United States on Aug. 12 alone, by far the most in 1 day since the current outbreak began.

“We are still operating under a containment goal, although I know many states are starting to wonder if we’re shifting to more of a mitigation phase right now, given that our case counts are still rising rapidly,” Jennifer McQuiston, DVM, the CDC’s top monkeypox official, told a group of the agency’s advisers on Aug. 9, according to CBS News.

Since late July, the United States has reported more monkeypox cases than any other nation. After the United States, Spain has reported 5,162 cases, the United Kingdom 3,017, and France 2,423, according to the World Health Organization.

Globally, 31,655 cases have been recorded, with 5,108 of those cases coming in the last 7 days, according to the WHO. There have been 12 deaths attributed to monkeypox, with one coming in the last week.

The smallpox-like disease was first found in humans in the Democratic Republic of the Congo in 1970 and has become more common in West and Central Africa. It began spreading to European and other Western nations in May 2022.

The WHO declared it a global public health emergency in late July, and the Biden administration declared it a national health emergency Aug. 4.

To fight the spread of monkeypox, the Biden administration is buying $26 million worth of SIGA Technologies Inc.’s IV version of the antiviral drug TPOXX, the company announced on Aug. 9.

U.S. health officials also modified monkeypox vaccine dosing instructions to stretch the supply of vaccine. Instead of sticking with a standard shot that would enter deep into tissue, the FDA now encourages a new way: just under the skin at one-fifth the usual dose.

A version of this article first appeared on WebMD.com.

The United States has now recorded more than 10,000 confirmed monkeypox cases, according to data released by the Centers for Disease Control and Prevention.

The United States passed the 10,000 mark on Aug. 10, with the number climbing to 10,768 by the morning of Aug. 12, according to the latest CDC data. Monkeypox cases have been found in every state except Wyoming. New York (2,187), California (1,892), and Florida (1,053) have reported the most cases. So far, no monkeypox deaths have been reported in the United States.

The numbers are increasing, with 1,391 cases reported in the United States on Aug. 12 alone, by far the most in 1 day since the current outbreak began.

“We are still operating under a containment goal, although I know many states are starting to wonder if we’re shifting to more of a mitigation phase right now, given that our case counts are still rising rapidly,” Jennifer McQuiston, DVM, the CDC’s top monkeypox official, told a group of the agency’s advisers on Aug. 9, according to CBS News.

Since late July, the United States has reported more monkeypox cases than any other nation. After the United States, Spain has reported 5,162 cases, the United Kingdom 3,017, and France 2,423, according to the World Health Organization.

Globally, 31,655 cases have been recorded, with 5,108 of those cases coming in the last 7 days, according to the WHO. There have been 12 deaths attributed to monkeypox, with one coming in the last week.

The smallpox-like disease was first found in humans in the Democratic Republic of the Congo in 1970 and has become more common in West and Central Africa. It began spreading to European and other Western nations in May 2022.

The WHO declared it a global public health emergency in late July, and the Biden administration declared it a national health emergency Aug. 4.

To fight the spread of monkeypox, the Biden administration is buying $26 million worth of SIGA Technologies Inc.’s IV version of the antiviral drug TPOXX, the company announced on Aug. 9.

U.S. health officials also modified monkeypox vaccine dosing instructions to stretch the supply of vaccine. Instead of sticking with a standard shot that would enter deep into tissue, the FDA now encourages a new way: just under the skin at one-fifth the usual dose.

A version of this article first appeared on WebMD.com.

The United States has now recorded more than 10,000 confirmed monkeypox cases, according to data released by the Centers for Disease Control and Prevention.

The United States passed the 10,000 mark on Aug. 10, with the number climbing to 10,768 by the morning of Aug. 12, according to the latest CDC data. Monkeypox cases have been found in every state except Wyoming. New York (2,187), California (1,892), and Florida (1,053) have reported the most cases. So far, no monkeypox deaths have been reported in the United States.

The numbers are increasing, with 1,391 cases reported in the United States on Aug. 12 alone, by far the most in 1 day since the current outbreak began.

“We are still operating under a containment goal, although I know many states are starting to wonder if we’re shifting to more of a mitigation phase right now, given that our case counts are still rising rapidly,” Jennifer McQuiston, DVM, the CDC’s top monkeypox official, told a group of the agency’s advisers on Aug. 9, according to CBS News.

Since late July, the United States has reported more monkeypox cases than any other nation. After the United States, Spain has reported 5,162 cases, the United Kingdom 3,017, and France 2,423, according to the World Health Organization.

Globally, 31,655 cases have been recorded, with 5,108 of those cases coming in the last 7 days, according to the WHO. There have been 12 deaths attributed to monkeypox, with one coming in the last week.

The smallpox-like disease was first found in humans in the Democratic Republic of the Congo in 1970 and has become more common in West and Central Africa. It began spreading to European and other Western nations in May 2022.

The WHO declared it a global public health emergency in late July, and the Biden administration declared it a national health emergency Aug. 4.

To fight the spread of monkeypox, the Biden administration is buying $26 million worth of SIGA Technologies Inc.’s IV version of the antiviral drug TPOXX, the company announced on Aug. 9.

U.S. health officials also modified monkeypox vaccine dosing instructions to stretch the supply of vaccine. Instead of sticking with a standard shot that would enter deep into tissue, the FDA now encourages a new way: just under the skin at one-fifth the usual dose.

A version of this article first appeared on WebMD.com.

In 2021, in U.S. states far removed from one another, numerous cases of melioidosis (Whitmore’s disease) sprang up, some with a fatal outcome. What is the common factor linking all of those affected? So begins the search for evidence.

No relations or common journeys

Between March and July 2021, cases of the bacterial infectious disease sprang up in Georgia, Kansas, Minnesota, and Texas, with the disease being fatal for two of those affected. Usually, cases of melioidosis occur in the United States after traveling to regions where the pathogen is prevalent. However, none of the patients had undertaken any previous international travel.

When the genomes of the bacterial strains (Burkholderia pseudomallei) were sequenced, they showed a high level of concordance, suggesting a common source of infection. The bacterial strain is similar to those that are found in Southeast Asia above all. An imported product from there was taken into consideration as the trigger.

The Centers for Disease Control and Prevention examined blood samples from the patients, as well as samples from the soil, water, food, and household items around their homes.
 

Aroma spray as a trigger

In October, the cause of the melioidosis was finally identified in the house of the patient from Georgia: an aromatherapy spray. The genetic fingerprint of the bacterial strain matched with that from the other patients. The common trigger was thus discovered.

The contaminated spray, with a lavender-chamomile scent for room fragrancing, was sold between February and October in some branches of Walmart, as well as in their online store. The product was therefore recalled and it was checked whether the ingredients were also being used in other products.

The CDC requested physicians to also take melioidosis into account if they were presented with acute bacterial infections that did not respond to normal antibiotics and to inquire whether the affected room spray had been used.
 

More information about melioidosis

Melioidosis is an infectious disease affecting humans and animals. The trigger is the bacteria B pseudomallei. The disease appears predominantly in tropical regions, especially in Southeast Asia and northern Australia.

Transmission

The bacteria can be found in contaminated water and soil. It is disseminated between humans and animals through direct contact with the infectious source, such as through inhaling dust particles or water droplets, or through consuming contaminated water or food. Human-to-human transmission is extremely rare. Recently however, tropical saltwater fish were identified as potential carriers.

Symptoms

Melioidosis has a wide range of symptoms, which can lead to its being confused with other diseases such as tuberculosis or other forms of pneumonia. There are different forms of the disease, each with different symptoms.

• Localized infection: localized pain and swelling, fever, ulceration, and abscess.
• Pulmonary infection: cough, chest pain, high fever, headaches, and loss of appetite
• Bacteremia: fever, headaches, breathing problems, stomach discomfort, joint pain, and disorientation.
• Disseminated infection: fever, weight loss, stomach or chest pain, muscle or joint pain, headaches, central nervous system infections, and epileptic seizures.

The incubation time is not clearly defined and can be from 1 day to several years; however, the symptoms mostly emerge 2-4 weeks after exposure. The risk factors include diabetes, high alcohol consumption, chronic pulmonary or kidney disease, and immunodeficiencies.

Diagnosis based on the symptoms is often difficult since the clinical picture is similar to other, more common conditions.
 

Therapy

If the melioidosis is identified as such, it can be treated with only mildly effective antibiotics, since it has a natural resistance to many commonly used antibiotics. The type of infection and the course of treatment also affects the long-term outcome. Without treatment, 90% of the infections have a fatal outcome. With appropriate treatment, the mortality rate still lies at 40%.

Therapy generally begins with intravenous antibiotic therapy for at least 2-8 weeks (ceftazidime or meropenem). Oral antibiotic therapy then follows for 3-6 months (trimethoprim-sulfamethoxazole or amoxicillin/clavulanic acid). If the patient is allergic to penicillin, alternative antibiotics can be used.
 

Use as a bioweapon

The CDC classifies B. pseudomallei as a potential pathogen for biological attack (class-B candidate). The agency lists the potential reasons for use as a bioweapon as:

• The pathogen can be found naturally in certain regions.
• The triggered disease can take a serious course and ultimately be fatal without appropriate therapy.
• In the past, the United States has used similar pathogens in wars as bioweapons.

In a potential attack, the pathogen could be spread through air, water, or food, and by doing so, many people would be exposed. Any contact with the bacteria can result in melioidosis. As the bacteria cannot be seen, smelled, or tasted, the biological attack would not be recognized for some time. A certain amount of time can also pass until the pathogen is identified, once fever and respiratory diseases have developed.

In such an emergency, the CDC would collaborate with other federal and local authorities to supply specialized testing laboratories and provide the public with information.

This content was translated from Coliquio. A version appeared on Medscape.com.

In 2021, in U.S. states far removed from one another, numerous cases of melioidosis (Whitmore’s disease) sprang up, some with a fatal outcome. What is the common factor linking all of those affected? So begins the search for evidence.

No relations or common journeys

Between March and July 2021, cases of the bacterial infectious disease sprang up in Georgia, Kansas, Minnesota, and Texas, with the disease being fatal for two of those affected. Usually, cases of melioidosis occur in the United States after traveling to regions where the pathogen is prevalent. However, none of the patients had undertaken any previous international travel.

When the genomes of the bacterial strains (Burkholderia pseudomallei) were sequenced, they showed a high level of concordance, suggesting a common source of infection. The bacterial strain is similar to those that are found in Southeast Asia above all. An imported product from there was taken into consideration as the trigger.

The Centers for Disease Control and Prevention examined blood samples from the patients, as well as samples from the soil, water, food, and household items around their homes.
 

Aroma spray as a trigger

In October, the cause of the melioidosis was finally identified in the house of the patient from Georgia: an aromatherapy spray. The genetic fingerprint of the bacterial strain matched with that from the other patients. The common trigger was thus discovered.

The contaminated spray, with a lavender-chamomile scent for room fragrancing, was sold between February and October in some branches of Walmart, as well as in their online store. The product was therefore recalled and it was checked whether the ingredients were also being used in other products.

The CDC requested physicians to also take melioidosis into account if they were presented with acute bacterial infections that did not respond to normal antibiotics and to inquire whether the affected room spray had been used.
 

More information about melioidosis

Melioidosis is an infectious disease affecting humans and animals. The trigger is the bacteria B pseudomallei. The disease appears predominantly in tropical regions, especially in Southeast Asia and northern Australia.

Transmission

The bacteria can be found in contaminated water and soil. It is disseminated between humans and animals through direct contact with the infectious source, such as through inhaling dust particles or water droplets, or through consuming contaminated water or food. Human-to-human transmission is extremely rare. Recently however, tropical saltwater fish were identified as potential carriers.

Symptoms

Melioidosis has a wide range of symptoms, which can lead to its being confused with other diseases such as tuberculosis or other forms of pneumonia. There are different forms of the disease, each with different symptoms.

• Localized infection: localized pain and swelling, fever, ulceration, and abscess.
• Pulmonary infection: cough, chest pain, high fever, headaches, and loss of appetite
• Bacteremia: fever, headaches, breathing problems, stomach discomfort, joint pain, and disorientation.
• Disseminated infection: fever, weight loss, stomach or chest pain, muscle or joint pain, headaches, central nervous system infections, and epileptic seizures.

The incubation time is not clearly defined and can be from 1 day to several years; however, the symptoms mostly emerge 2-4 weeks after exposure. The risk factors include diabetes, high alcohol consumption, chronic pulmonary or kidney disease, and immunodeficiencies.

Diagnosis based on the symptoms is often difficult since the clinical picture is similar to other, more common conditions.
 

Therapy

If the melioidosis is identified as such, it can be treated with only mildly effective antibiotics, since it has a natural resistance to many commonly used antibiotics. The type of infection and the course of treatment also affects the long-term outcome. Without treatment, 90% of the infections have a fatal outcome. With appropriate treatment, the mortality rate still lies at 40%.

Therapy generally begins with intravenous antibiotic therapy for at least 2-8 weeks (ceftazidime or meropenem). Oral antibiotic therapy then follows for 3-6 months (trimethoprim-sulfamethoxazole or amoxicillin/clavulanic acid). If the patient is allergic to penicillin, alternative antibiotics can be used.
 

Use as a bioweapon

The CDC classifies B. pseudomallei as a potential pathogen for biological attack (class-B candidate). The agency lists the potential reasons for use as a bioweapon as:

• The pathogen can be found naturally in certain regions.
• The triggered disease can take a serious course and ultimately be fatal without appropriate therapy.
• In the past, the United States has used similar pathogens in wars as bioweapons.

In a potential attack, the pathogen could be spread through air, water, or food, and by doing so, many people would be exposed. Any contact with the bacteria can result in melioidosis. As the bacteria cannot be seen, smelled, or tasted, the biological attack would not be recognized for some time. A certain amount of time can also pass until the pathogen is identified, once fever and respiratory diseases have developed.

In such an emergency, the CDC would collaborate with other federal and local authorities to supply specialized testing laboratories and provide the public with information.

This content was translated from Coliquio. A version appeared on Medscape.com.

In 2021, in U.S. states far removed from one another, numerous cases of melioidosis (Whitmore’s disease) sprang up, some with a fatal outcome. What is the common factor linking all of those affected? So begins the search for evidence.

No relations or common journeys

Between March and July 2021, cases of the bacterial infectious disease sprang up in Georgia, Kansas, Minnesota, and Texas, with the disease being fatal for two of those affected. Usually, cases of melioidosis occur in the United States after traveling to regions where the pathogen is prevalent. However, none of the patients had undertaken any previous international travel.

When the genomes of the bacterial strains (Burkholderia pseudomallei) were sequenced, they showed a high level of concordance, suggesting a common source of infection. The bacterial strain is similar to those that are found in Southeast Asia above all. An imported product from there was taken into consideration as the trigger.

The Centers for Disease Control and Prevention examined blood samples from the patients, as well as samples from the soil, water, food, and household items around their homes.
 

Aroma spray as a trigger

In October, the cause of the melioidosis was finally identified in the house of the patient from Georgia: an aromatherapy spray. The genetic fingerprint of the bacterial strain matched with that from the other patients. The common trigger was thus discovered.

The contaminated spray, with a lavender-chamomile scent for room fragrancing, was sold between February and October in some branches of Walmart, as well as in their online store. The product was therefore recalled and it was checked whether the ingredients were also being used in other products.

The CDC requested physicians to also take melioidosis into account if they were presented with acute bacterial infections that did not respond to normal antibiotics and to inquire whether the affected room spray had been used.
 

More information about melioidosis

Melioidosis is an infectious disease affecting humans and animals. The trigger is the bacteria B pseudomallei. The disease appears predominantly in tropical regions, especially in Southeast Asia and northern Australia.

Transmission

The bacteria can be found in contaminated water and soil. It is disseminated between humans and animals through direct contact with the infectious source, such as through inhaling dust particles or water droplets, or through consuming contaminated water or food. Human-to-human transmission is extremely rare. Recently however, tropical saltwater fish were identified as potential carriers.

Symptoms

Melioidosis has a wide range of symptoms, which can lead to its being confused with other diseases such as tuberculosis or other forms of pneumonia. There are different forms of the disease, each with different symptoms.

• Localized infection: localized pain and swelling, fever, ulceration, and abscess.
• Pulmonary infection: cough, chest pain, high fever, headaches, and loss of appetite
• Bacteremia: fever, headaches, breathing problems, stomach discomfort, joint pain, and disorientation.
• Disseminated infection: fever, weight loss, stomach or chest pain, muscle or joint pain, headaches, central nervous system infections, and epileptic seizures.

The incubation time is not clearly defined and can be from 1 day to several years; however, the symptoms mostly emerge 2-4 weeks after exposure. The risk factors include diabetes, high alcohol consumption, chronic pulmonary or kidney disease, and immunodeficiencies.

Diagnosis based on the symptoms is often difficult since the clinical picture is similar to other, more common conditions.
 

Therapy

If the melioidosis is identified as such, it can be treated with only mildly effective antibiotics, since it has a natural resistance to many commonly used antibiotics. The type of infection and the course of treatment also affects the long-term outcome. Without treatment, 90% of the infections have a fatal outcome. With appropriate treatment, the mortality rate still lies at 40%.

Therapy generally begins with intravenous antibiotic therapy for at least 2-8 weeks (ceftazidime or meropenem). Oral antibiotic therapy then follows for 3-6 months (trimethoprim-sulfamethoxazole or amoxicillin/clavulanic acid). If the patient is allergic to penicillin, alternative antibiotics can be used.
 

Use as a bioweapon

The CDC classifies B. pseudomallei as a potential pathogen for biological attack (class-B candidate). The agency lists the potential reasons for use as a bioweapon as:

• The pathogen can be found naturally in certain regions.
• The triggered disease can take a serious course and ultimately be fatal without appropriate therapy.
• In the past, the United States has used similar pathogens in wars as bioweapons.

In a potential attack, the pathogen could be spread through air, water, or food, and by doing so, many people would be exposed. Any contact with the bacteria can result in melioidosis. As the bacteria cannot be seen, smelled, or tasted, the biological attack would not be recognized for some time. A certain amount of time can also pass until the pathogen is identified, once fever and respiratory diseases have developed.

In such an emergency, the CDC would collaborate with other federal and local authorities to supply specialized testing laboratories and provide the public with information.

This content was translated from Coliquio. A version appeared on Medscape.com.

In creating a guide about monkeypox for ob.gyns., Denise J. Jamieson, MD, MPH, turned to research she relied on during another outbreak of the disease nearly 20 years ago.

Dr. Jamieson, the James Robert McCord Professor and chair of the department of gynecology and obstetrics at Emory Healthcare, Atlanta, had been working for the Centers for Disease Control and Prevention in 2003 when doctors diagnosed monkeypox in several states.

That year, the virus was mainly transmitted by contact with pet prairie dogs, including in childcare and school settings. Of the approximately 70 suspected and confirmed cases, 55% occurred in female patients, according to one study .

Dr. Jamieson, an obstetrician with a focus on emerging infectious diseases, and colleagues at the agency published a commentary in Obstetrics & Gynecology highlighting the need for physicians to stay up to date with relevant information about the virus.

Fast forward to 2022: Dr. Jamieson – again with coauthors from the CDC – is delivering a similar message in the same journal about the need for clinicians to be prepared for this virus.

“Most ob.gyns. have never seen a case of monkeypox virus infection and may not be aware of testing, treatment, or pre-exposure or postexposure vaccine options,” she and her coauthors wrote in a primer published online.

But if a woman were to contract the virus, her ob.gyn. might well be the first clinician she called. “We are often the first people, the first physicians to see and evaluate women with various symptoms,” Dr. Jamieson said.

To promptly diagnose, treat, and prevent further spread of monkeypox, ob.gyns. need up-to-date information, Dr. Jamieson and colleagues said.

Based on data from related viruses like smallpox, monkeypox may be more severe in pregnant women and entail risk for adverse pregnancy outcomes, Dr. Jamieson said.
 

Outliers

So far this year, monkeypox has predominantly spread among men who have sex with men. Cases have occurred in women, however, some of whom have required hospitalization.

According to the CDC, as of July 25, 1,373 cases of monkeypox in the United States were in men and 13 in women. The total confirmed case count exceeded 5,800 as of Aug. 1. The agency recently announced that it planned to make the disease a reportable condition.

In the United Kingdom, which has been hit hard by the outbreak, researchers are keeping a close eye on the number of cases in women to assess how the disease is spreading.

At least one case of monkeypox in the United States has occurred in a pregnant woman who delivered. The mother and baby, who received immune globulin as a preventive measure, are doing well, according to health officials.  

“We know that infection can occur through placental transfer. In the case that we are aware of presently, it does not appear that the virus was transmitted,” said John T. Brooks, MD, the CDC’s chief medical officer in the division of HIV prevention, on a July 23 call with clinicians.

While monkeypox can be transmitted in utero and during sexual activity, it also can spread through any close contact with skin lesions or body fluids and possibly through touching contaminated items like clothing or linens, according to the CDC.
 

A preferred vaccine and antiviral in pregnancy

One monkeypox vaccine, Jynneos, is preferred for use during pregnancy, while another, ACAM2000, is contraindicated, the CDC advises.

Jynneos can be offered to people who are pregnant or breastfeeding who are eligible for vaccination based on confirmed or likely contact with cases, ideally within 4 days of exposure. People at high risk for exposure, such as laboratory workers, may receive the vaccine in advance.

Developmental toxicity studies in animals showed no evidence of harm with the Jynneos vaccine, Dr. Jamieson said.

ACAM2000, however, can cause fetal vaccinia and should not be used in people who are pregnant or breastfeeding, according to the CDC.

The Society for Maternal-Fetal Medicine notes that, if treatment for monkeypox is warranted, tecovirimat should be considered the first-line antiviral for pregnant, recently pregnant, and breastfeeding people, in line with CDC guidance.
 

Current outbreak ‘very different,’ but lessons apply

In 2003, some women exposed to monkeypox through contact with infected prairie dogs were pregnant – which is how Dr. Jamieson came to be involved in responding to the outbreak and studying the effects of the virus in pregnancy.

“When this resurfaced this year, of course it caught my attention,” Dr. Jamieson said. The extensive person-to-person transmission and far greater number of cases today make the current outbreak “very different” from the prior one, she said.

But key principles in managing the disease and understanding its potential risks in pregnancy – despite relatively limited information – remain the same.

“Whenever you are looking at an infectious disease, you want to think about, are pregnant persons more susceptible or more likely to have severe disease,” Dr. Jamieson said. Smallpox, a similar orthopoxvirus, “is more severe during pregnancy with a higher case fatality rate,” which is one reason for concern with monkeypox in this population.

In terms of pregnancy outcomes, researchers have data from only a handful of confirmed cases of monkeypox, which makes it difficult to draw conclusions, Dr. Jamieson said. A review of five cases from outside the United States in prior years found that three resulted in loss of the pregnancy. One resulted in preterm delivery of an infant who subsequently died. One child was apparently healthy and born at term.
 

Addition to the differential diagnosis

A separate team of researchers has proposed a clinical management algorithm for pregnant women with suspected exposure to monkeypox.

“Clinicians must maintain a high index of suspicion for monkeypox virus in any pregnant woman presenting with lymphadenopathy and vesiculopustular rash – including rash localized to the genital or perianal region – even if there are no apparent epidemiological links,” Pradip Dashraath, MBBS, National University Hospital, Singapore, and coauthors wrote in The Lancet.

Jamieson echoed the call for increased vigilance.

“As ob.gyns., people may present to us with genital lesions concerning for sexually transmitted infection. And it is important to include monkeypox in our differential,” Dr. Jamieson said. “We are trying to get the word out that it needs to be part of what you think about when you see a patient with genital ulcers.”

Health care professionals have acquired monkeypox through contact with patients or fomites, so clinicians should be sure to use appropriate precautions when evaluating patients who might have monkeypox, Dr. Jamieson added. Appropriate protective measures include wearing a gown, gloves, eye protection, and an N95.

A version of this article first appeared on Medscape.com.

In creating a guide about monkeypox for ob.gyns., Denise J. Jamieson, MD, MPH, turned to research she relied on during another outbreak of the disease nearly 20 years ago.

Dr. Jamieson, the James Robert McCord Professor and chair of the department of gynecology and obstetrics at Emory Healthcare, Atlanta, had been working for the Centers for Disease Control and Prevention in 2003 when doctors diagnosed monkeypox in several states.

That year, the virus was mainly transmitted by contact with pet prairie dogs, including in childcare and school settings. Of the approximately 70 suspected and confirmed cases, 55% occurred in female patients, according to one study .

Dr. Jamieson, an obstetrician with a focus on emerging infectious diseases, and colleagues at the agency published a commentary in Obstetrics & Gynecology highlighting the need for physicians to stay up to date with relevant information about the virus.

Fast forward to 2022: Dr. Jamieson – again with coauthors from the CDC – is delivering a similar message in the same journal about the need for clinicians to be prepared for this virus.

“Most ob.gyns. have never seen a case of monkeypox virus infection and may not be aware of testing, treatment, or pre-exposure or postexposure vaccine options,” she and her coauthors wrote in a primer published online.

But if a woman were to contract the virus, her ob.gyn. might well be the first clinician she called. “We are often the first people, the first physicians to see and evaluate women with various symptoms,” Dr. Jamieson said.

To promptly diagnose, treat, and prevent further spread of monkeypox, ob.gyns. need up-to-date information, Dr. Jamieson and colleagues said.

Based on data from related viruses like smallpox, monkeypox may be more severe in pregnant women and entail risk for adverse pregnancy outcomes, Dr. Jamieson said.
 

Outliers

So far this year, monkeypox has predominantly spread among men who have sex with men. Cases have occurred in women, however, some of whom have required hospitalization.

According to the CDC, as of July 25, 1,373 cases of monkeypox in the United States were in men and 13 in women. The total confirmed case count exceeded 5,800 as of Aug. 1. The agency recently announced that it planned to make the disease a reportable condition.

In the United Kingdom, which has been hit hard by the outbreak, researchers are keeping a close eye on the number of cases in women to assess how the disease is spreading.

At least one case of monkeypox in the United States has occurred in a pregnant woman who delivered. The mother and baby, who received immune globulin as a preventive measure, are doing well, according to health officials.  

“We know that infection can occur through placental transfer. In the case that we are aware of presently, it does not appear that the virus was transmitted,” said John T. Brooks, MD, the CDC’s chief medical officer in the division of HIV prevention, on a July 23 call with clinicians.

While monkeypox can be transmitted in utero and during sexual activity, it also can spread through any close contact with skin lesions or body fluids and possibly through touching contaminated items like clothing or linens, according to the CDC.
 

A preferred vaccine and antiviral in pregnancy

One monkeypox vaccine, Jynneos, is preferred for use during pregnancy, while another, ACAM2000, is contraindicated, the CDC advises.

Jynneos can be offered to people who are pregnant or breastfeeding who are eligible for vaccination based on confirmed or likely contact with cases, ideally within 4 days of exposure. People at high risk for exposure, such as laboratory workers, may receive the vaccine in advance.

Developmental toxicity studies in animals showed no evidence of harm with the Jynneos vaccine, Dr. Jamieson said.

ACAM2000, however, can cause fetal vaccinia and should not be used in people who are pregnant or breastfeeding, according to the CDC.

The Society for Maternal-Fetal Medicine notes that, if treatment for monkeypox is warranted, tecovirimat should be considered the first-line antiviral for pregnant, recently pregnant, and breastfeeding people, in line with CDC guidance.
 

Current outbreak ‘very different,’ but lessons apply

In 2003, some women exposed to monkeypox through contact with infected prairie dogs were pregnant – which is how Dr. Jamieson came to be involved in responding to the outbreak and studying the effects of the virus in pregnancy.

“When this resurfaced this year, of course it caught my attention,” Dr. Jamieson said. The extensive person-to-person transmission and far greater number of cases today make the current outbreak “very different” from the prior one, she said.

But key principles in managing the disease and understanding its potential risks in pregnancy – despite relatively limited information – remain the same.

“Whenever you are looking at an infectious disease, you want to think about, are pregnant persons more susceptible or more likely to have severe disease,” Dr. Jamieson said. Smallpox, a similar orthopoxvirus, “is more severe during pregnancy with a higher case fatality rate,” which is one reason for concern with monkeypox in this population.

In terms of pregnancy outcomes, researchers have data from only a handful of confirmed cases of monkeypox, which makes it difficult to draw conclusions, Dr. Jamieson said. A review of five cases from outside the United States in prior years found that three resulted in loss of the pregnancy. One resulted in preterm delivery of an infant who subsequently died. One child was apparently healthy and born at term.
 

Addition to the differential diagnosis

A separate team of researchers has proposed a clinical management algorithm for pregnant women with suspected exposure to monkeypox.

“Clinicians must maintain a high index of suspicion for monkeypox virus in any pregnant woman presenting with lymphadenopathy and vesiculopustular rash – including rash localized to the genital or perianal region – even if there are no apparent epidemiological links,” Pradip Dashraath, MBBS, National University Hospital, Singapore, and coauthors wrote in The Lancet.

Jamieson echoed the call for increased vigilance.

“As ob.gyns., people may present to us with genital lesions concerning for sexually transmitted infection. And it is important to include monkeypox in our differential,” Dr. Jamieson said. “We are trying to get the word out that it needs to be part of what you think about when you see a patient with genital ulcers.”

Health care professionals have acquired monkeypox through contact with patients or fomites, so clinicians should be sure to use appropriate precautions when evaluating patients who might have monkeypox, Dr. Jamieson added. Appropriate protective measures include wearing a gown, gloves, eye protection, and an N95.

A version of this article first appeared on Medscape.com.

In creating a guide about monkeypox for ob.gyns., Denise J. Jamieson, MD, MPH, turned to research she relied on during another outbreak of the disease nearly 20 years ago.

Dr. Jamieson, the James Robert McCord Professor and chair of the department of gynecology and obstetrics at Emory Healthcare, Atlanta, had been working for the Centers for Disease Control and Prevention in 2003 when doctors diagnosed monkeypox in several states.

That year, the virus was mainly transmitted by contact with pet prairie dogs, including in childcare and school settings. Of the approximately 70 suspected and confirmed cases, 55% occurred in female patients, according to one study .

Dr. Jamieson, an obstetrician with a focus on emerging infectious diseases, and colleagues at the agency published a commentary in Obstetrics & Gynecology highlighting the need for physicians to stay up to date with relevant information about the virus.

Fast forward to 2022: Dr. Jamieson – again with coauthors from the CDC – is delivering a similar message in the same journal about the need for clinicians to be prepared for this virus.

“Most ob.gyns. have never seen a case of monkeypox virus infection and may not be aware of testing, treatment, or pre-exposure or postexposure vaccine options,” she and her coauthors wrote in a primer published online.

But if a woman were to contract the virus, her ob.gyn. might well be the first clinician she called. “We are often the first people, the first physicians to see and evaluate women with various symptoms,” Dr. Jamieson said.

To promptly diagnose, treat, and prevent further spread of monkeypox, ob.gyns. need up-to-date information, Dr. Jamieson and colleagues said.

Based on data from related viruses like smallpox, monkeypox may be more severe in pregnant women and entail risk for adverse pregnancy outcomes, Dr. Jamieson said.
 

Outliers

So far this year, monkeypox has predominantly spread among men who have sex with men. Cases have occurred in women, however, some of whom have required hospitalization.

According to the CDC, as of July 25, 1,373 cases of monkeypox in the United States were in men and 13 in women. The total confirmed case count exceeded 5,800 as of Aug. 1. The agency recently announced that it planned to make the disease a reportable condition.

In the United Kingdom, which has been hit hard by the outbreak, researchers are keeping a close eye on the number of cases in women to assess how the disease is spreading.

At least one case of monkeypox in the United States has occurred in a pregnant woman who delivered. The mother and baby, who received immune globulin as a preventive measure, are doing well, according to health officials.  

“We know that infection can occur through placental transfer. In the case that we are aware of presently, it does not appear that the virus was transmitted,” said John T. Brooks, MD, the CDC’s chief medical officer in the division of HIV prevention, on a July 23 call with clinicians.

While monkeypox can be transmitted in utero and during sexual activity, it also can spread through any close contact with skin lesions or body fluids and possibly through touching contaminated items like clothing or linens, according to the CDC.
 

A preferred vaccine and antiviral in pregnancy

One monkeypox vaccine, Jynneos, is preferred for use during pregnancy, while another, ACAM2000, is contraindicated, the CDC advises.

Jynneos can be offered to people who are pregnant or breastfeeding who are eligible for vaccination based on confirmed or likely contact with cases, ideally within 4 days of exposure. People at high risk for exposure, such as laboratory workers, may receive the vaccine in advance.

Developmental toxicity studies in animals showed no evidence of harm with the Jynneos vaccine, Dr. Jamieson said.

ACAM2000, however, can cause fetal vaccinia and should not be used in people who are pregnant or breastfeeding, according to the CDC.

The Society for Maternal-Fetal Medicine notes that, if treatment for monkeypox is warranted, tecovirimat should be considered the first-line antiviral for pregnant, recently pregnant, and breastfeeding people, in line with CDC guidance.
 

Current outbreak ‘very different,’ but lessons apply

In 2003, some women exposed to monkeypox through contact with infected prairie dogs were pregnant – which is how Dr. Jamieson came to be involved in responding to the outbreak and studying the effects of the virus in pregnancy.

“When this resurfaced this year, of course it caught my attention,” Dr. Jamieson said. The extensive person-to-person transmission and far greater number of cases today make the current outbreak “very different” from the prior one, she said.

But key principles in managing the disease and understanding its potential risks in pregnancy – despite relatively limited information – remain the same.

“Whenever you are looking at an infectious disease, you want to think about, are pregnant persons more susceptible or more likely to have severe disease,” Dr. Jamieson said. Smallpox, a similar orthopoxvirus, “is more severe during pregnancy with a higher case fatality rate,” which is one reason for concern with monkeypox in this population.

In terms of pregnancy outcomes, researchers have data from only a handful of confirmed cases of monkeypox, which makes it difficult to draw conclusions, Dr. Jamieson said. A review of five cases from outside the United States in prior years found that three resulted in loss of the pregnancy. One resulted in preterm delivery of an infant who subsequently died. One child was apparently healthy and born at term.
 

Addition to the differential diagnosis

A separate team of researchers has proposed a clinical management algorithm for pregnant women with suspected exposure to monkeypox.

“Clinicians must maintain a high index of suspicion for monkeypox virus in any pregnant woman presenting with lymphadenopathy and vesiculopustular rash – including rash localized to the genital or perianal region – even if there are no apparent epidemiological links,” Pradip Dashraath, MBBS, National University Hospital, Singapore, and coauthors wrote in The Lancet.

Jamieson echoed the call for increased vigilance.

“As ob.gyns., people may present to us with genital lesions concerning for sexually transmitted infection. And it is important to include monkeypox in our differential,” Dr. Jamieson said. “We are trying to get the word out that it needs to be part of what you think about when you see a patient with genital ulcers.”

Health care professionals have acquired monkeypox through contact with patients or fomites, so clinicians should be sure to use appropriate precautions when evaluating patients who might have monkeypox, Dr. Jamieson added. Appropriate protective measures include wearing a gown, gloves, eye protection, and an N95.

A version of this article first appeared on Medscape.com.

As cases of monkeypox continue to mount in the United States and abroad, infectious disease experts are closely monitoring one group of people in particular: women.

Monkeypox_NIAID_web.jpg

So far, the overwhelming majority of cases of the viral disease have been reported in men who have sex with men. But in recent days, officials have learned of a handful of cases in women – possibly indicating that the outbreak may be widening.

Researchers are keeping close tabs on the proportion of cases in women to “assess whether the outbreak is moving away” from networks of men who have sex with men, where most of the initial cases have been identified, according to a briefing from the UK Health Security Agency (UKHSA).

“There is insufficient evidence to support a change in the transmission dynamics,” the agency said. “However, over the last few weeks the proportion of female cases has been increasing, so this trend needs to be monitored closely.”

A global collaboration of researchers and clinicians recently described 528 cases of monkeypox in 16 countries – but none were in women.

Since data collection for that study ended in June, the research group has confirmed cases in women, said study coauthor John P. Thornhill, MD, PhD, consultant physician in sexual health and HIV and clinical senior lecturer at Barts Health NHS Trust and Queen Mary University of London.

“Cases in women have certainly been reported but are currently far less common,” Dr. Thornhill told this news organization.

Although infections in women have been outliers during the current outbreak, they can be severe when they do occur. Several women in England have been hospitalized with severe symptoms.

A similar pattern has been seen in New York City, where just one woman is among the 639 total cases, according to a July 21 report from the city’s health agency.

Researchers have recently published guidance on monkeypox for ob.gyns., maternal-fetal medicine subspecialists, and people who are pregnant or breastfeeding in anticipation of the possibility of more cases in women.

The Centers for Disease Control and Prevention advises that “pregnant, recently pregnant, and breastfeeding people should be prioritized for medical treatment” of monkeypox if needed. 

One monkeypox vaccine, Jynneos, can be offered to people who are pregnant or breastfeeding and are otherwise eligible for vaccination on the basis of confirmed or likely contact with cases, ideally within 4 days of exposure. Some people at high risk for exposure, such as laboratory workers, may receive the vaccine preemptively.

Another vaccine, ACAM2000, is contraindicated in people who are pregnant or breastfeeding, according to the CDC.
 

Transmission dynamics

Investigators have not yet identified substantial spread of monkeypox beyond men who have sex with men, although transmission among household contacts, including women and children, has been reported.

Most initial infections during the current outbreak occurred during sexual activity. But monkeypox can spread through any close contact with skin lesions or body fluids and possibly through touching contaminated items like clothing or linens, according to the CDC. It also may spread from mother to child in utero.

Infected pets have been known to spread the disease as well. A multistate monkeypox outbreak in the United States in 2003 was linked to pet prairie dogs, including in childcare and school settings. That year, 55% of the 71 cases occurred in female patients.
 

More testing, higher positivity rates in men

Since May, more men than women in the United Kingdom have undergone testing for monkeypox, with 3,467 tests in men versus 447 tests in women. Among those tested, the positivity rate has been far higher in men than in women, 54% versus 2.2%, respectively.

As of July 20, about 0.65% of U.K. cases with known gender were in women. Two weeks prior, about 0.4% were in women.

In all, 13 monkeypox cases in England have been in women, and four had severe manifestations that required hospitalization, according to the UKHSA.

Globally, more than 16,000 monkeypox cases have been reported, according to the World Health Organization. The agency said that it plans to rename the disease to reduce stigma.
 

Monkeypox and pregnancy

Ob.gyns. are often on the “front line in terms of identifying people with infectious diseases,” said Denise J. Jamieson, MD, MPH, Emory University, Atlanta. Dr. Jamieson coauthored “A Primer on Monkeypox Virus for Obstetrician-Gynecologists,” published in Obstetrics & Gynecology.

“Obstetricians need to be aware of what infectious diseases are circulating and be aware of what is going on in the community,” she said.

With monkeypox, “it is anybody’s guess as to how widespread this is going to be,” Dr. Jamieson said.

“The initial monkeypox cases in the current outbreak have been predominately but not exclusively among men who have sex with men; enhanced transmission in this group may be facilitated by sexual activity and spread through complex sexual networks,” Dr. Thornhill said. “As the outbreak continues, we will likely see more monkeypox infections” outside that group.

“Those working in sexual health should have a high index of suspicion in all individuals presenting with genital and oral ulcers and those with proctitis,” he added.

During previous monkeypox outbreaks, the chain of household transmissions has been short, typically two or three people, said Chloe M. Orkin, MD, professor of HIV medicine at Queen Mary University of London. Dr. Orkin directs the Sexual Health and HIV All East Research (SHARE) Collaborative, which has worked to compile the international case series.

Though monkeypox has mainly been transmitted among men who have sex with men, not all identify as gay and some may also have female and nonbinary partners, Dr. Orkin said.

“Clinicians should bear this in mind when examining any person,” she said.

A version of this article first appeared on Medscape.com.

As cases of monkeypox continue to mount in the United States and abroad, infectious disease experts are closely monitoring one group of people in particular: women.

Monkeypox_NIAID_web.jpg

So far, the overwhelming majority of cases of the viral disease have been reported in men who have sex with men. But in recent days, officials have learned of a handful of cases in women – possibly indicating that the outbreak may be widening.

Researchers are keeping close tabs on the proportion of cases in women to “assess whether the outbreak is moving away” from networks of men who have sex with men, where most of the initial cases have been identified, according to a briefing from the UK Health Security Agency (UKHSA).

“There is insufficient evidence to support a change in the transmission dynamics,” the agency said. “However, over the last few weeks the proportion of female cases has been increasing, so this trend needs to be monitored closely.”

A global collaboration of researchers and clinicians recently described 528 cases of monkeypox in 16 countries – but none were in women.

Since data collection for that study ended in June, the research group has confirmed cases in women, said study coauthor John P. Thornhill, MD, PhD, consultant physician in sexual health and HIV and clinical senior lecturer at Barts Health NHS Trust and Queen Mary University of London.

“Cases in women have certainly been reported but are currently far less common,” Dr. Thornhill told this news organization.

Although infections in women have been outliers during the current outbreak, they can be severe when they do occur. Several women in England have been hospitalized with severe symptoms.

A similar pattern has been seen in New York City, where just one woman is among the 639 total cases, according to a July 21 report from the city’s health agency.

Researchers have recently published guidance on monkeypox for ob.gyns., maternal-fetal medicine subspecialists, and people who are pregnant or breastfeeding in anticipation of the possibility of more cases in women.

The Centers for Disease Control and Prevention advises that “pregnant, recently pregnant, and breastfeeding people should be prioritized for medical treatment” of monkeypox if needed. 

One monkeypox vaccine, Jynneos, can be offered to people who are pregnant or breastfeeding and are otherwise eligible for vaccination on the basis of confirmed or likely contact with cases, ideally within 4 days of exposure. Some people at high risk for exposure, such as laboratory workers, may receive the vaccine preemptively.

Another vaccine, ACAM2000, is contraindicated in people who are pregnant or breastfeeding, according to the CDC.
 

Transmission dynamics

Investigators have not yet identified substantial spread of monkeypox beyond men who have sex with men, although transmission among household contacts, including women and children, has been reported.

Most initial infections during the current outbreak occurred during sexual activity. But monkeypox can spread through any close contact with skin lesions or body fluids and possibly through touching contaminated items like clothing or linens, according to the CDC. It also may spread from mother to child in utero.

Infected pets have been known to spread the disease as well. A multistate monkeypox outbreak in the United States in 2003 was linked to pet prairie dogs, including in childcare and school settings. That year, 55% of the 71 cases occurred in female patients.
 

More testing, higher positivity rates in men

Since May, more men than women in the United Kingdom have undergone testing for monkeypox, with 3,467 tests in men versus 447 tests in women. Among those tested, the positivity rate has been far higher in men than in women, 54% versus 2.2%, respectively.

As of July 20, about 0.65% of U.K. cases with known gender were in women. Two weeks prior, about 0.4% were in women.

In all, 13 monkeypox cases in England have been in women, and four had severe manifestations that required hospitalization, according to the UKHSA.

Globally, more than 16,000 monkeypox cases have been reported, according to the World Health Organization. The agency said that it plans to rename the disease to reduce stigma.
 

Monkeypox and pregnancy

Ob.gyns. are often on the “front line in terms of identifying people with infectious diseases,” said Denise J. Jamieson, MD, MPH, Emory University, Atlanta. Dr. Jamieson coauthored “A Primer on Monkeypox Virus for Obstetrician-Gynecologists,” published in Obstetrics & Gynecology.

“Obstetricians need to be aware of what infectious diseases are circulating and be aware of what is going on in the community,” she said.

With monkeypox, “it is anybody’s guess as to how widespread this is going to be,” Dr. Jamieson said.

“The initial monkeypox cases in the current outbreak have been predominately but not exclusively among men who have sex with men; enhanced transmission in this group may be facilitated by sexual activity and spread through complex sexual networks,” Dr. Thornhill said. “As the outbreak continues, we will likely see more monkeypox infections” outside that group.

“Those working in sexual health should have a high index of suspicion in all individuals presenting with genital and oral ulcers and those with proctitis,” he added.

During previous monkeypox outbreaks, the chain of household transmissions has been short, typically two or three people, said Chloe M. Orkin, MD, professor of HIV medicine at Queen Mary University of London. Dr. Orkin directs the Sexual Health and HIV All East Research (SHARE) Collaborative, which has worked to compile the international case series.

Though monkeypox has mainly been transmitted among men who have sex with men, not all identify as gay and some may also have female and nonbinary partners, Dr. Orkin said.

“Clinicians should bear this in mind when examining any person,” she said.

A version of this article first appeared on Medscape.com.

As cases of monkeypox continue to mount in the United States and abroad, infectious disease experts are closely monitoring one group of people in particular: women.

Monkeypox_NIAID_web.jpg

So far, the overwhelming majority of cases of the viral disease have been reported in men who have sex with men. But in recent days, officials have learned of a handful of cases in women – possibly indicating that the outbreak may be widening.

Researchers are keeping close tabs on the proportion of cases in women to “assess whether the outbreak is moving away” from networks of men who have sex with men, where most of the initial cases have been identified, according to a briefing from the UK Health Security Agency (UKHSA).

“There is insufficient evidence to support a change in the transmission dynamics,” the agency said. “However, over the last few weeks the proportion of female cases has been increasing, so this trend needs to be monitored closely.”

A global collaboration of researchers and clinicians recently described 528 cases of monkeypox in 16 countries – but none were in women.

Since data collection for that study ended in June, the research group has confirmed cases in women, said study coauthor John P. Thornhill, MD, PhD, consultant physician in sexual health and HIV and clinical senior lecturer at Barts Health NHS Trust and Queen Mary University of London.

“Cases in women have certainly been reported but are currently far less common,” Dr. Thornhill told this news organization.

Although infections in women have been outliers during the current outbreak, they can be severe when they do occur. Several women in England have been hospitalized with severe symptoms.

A similar pattern has been seen in New York City, where just one woman is among the 639 total cases, according to a July 21 report from the city’s health agency.

Researchers have recently published guidance on monkeypox for ob.gyns., maternal-fetal medicine subspecialists, and people who are pregnant or breastfeeding in anticipation of the possibility of more cases in women.

The Centers for Disease Control and Prevention advises that “pregnant, recently pregnant, and breastfeeding people should be prioritized for medical treatment” of monkeypox if needed. 

One monkeypox vaccine, Jynneos, can be offered to people who are pregnant or breastfeeding and are otherwise eligible for vaccination on the basis of confirmed or likely contact with cases, ideally within 4 days of exposure. Some people at high risk for exposure, such as laboratory workers, may receive the vaccine preemptively.

Another vaccine, ACAM2000, is contraindicated in people who are pregnant or breastfeeding, according to the CDC.
 

Transmission dynamics

Investigators have not yet identified substantial spread of monkeypox beyond men who have sex with men, although transmission among household contacts, including women and children, has been reported.

Most initial infections during the current outbreak occurred during sexual activity. But monkeypox can spread through any close contact with skin lesions or body fluids and possibly through touching contaminated items like clothing or linens, according to the CDC. It also may spread from mother to child in utero.

Infected pets have been known to spread the disease as well. A multistate monkeypox outbreak in the United States in 2003 was linked to pet prairie dogs, including in childcare and school settings. That year, 55% of the 71 cases occurred in female patients.
 

More testing, higher positivity rates in men

Since May, more men than women in the United Kingdom have undergone testing for monkeypox, with 3,467 tests in men versus 447 tests in women. Among those tested, the positivity rate has been far higher in men than in women, 54% versus 2.2%, respectively.

As of July 20, about 0.65% of U.K. cases with known gender were in women. Two weeks prior, about 0.4% were in women.

In all, 13 monkeypox cases in England have been in women, and four had severe manifestations that required hospitalization, according to the UKHSA.

Globally, more than 16,000 monkeypox cases have been reported, according to the World Health Organization. The agency said that it plans to rename the disease to reduce stigma.
 

Monkeypox and pregnancy

Ob.gyns. are often on the “front line in terms of identifying people with infectious diseases,” said Denise J. Jamieson, MD, MPH, Emory University, Atlanta. Dr. Jamieson coauthored “A Primer on Monkeypox Virus for Obstetrician-Gynecologists,” published in Obstetrics & Gynecology.

“Obstetricians need to be aware of what infectious diseases are circulating and be aware of what is going on in the community,” she said.

With monkeypox, “it is anybody’s guess as to how widespread this is going to be,” Dr. Jamieson said.

“The initial monkeypox cases in the current outbreak have been predominately but not exclusively among men who have sex with men; enhanced transmission in this group may be facilitated by sexual activity and spread through complex sexual networks,” Dr. Thornhill said. “As the outbreak continues, we will likely see more monkeypox infections” outside that group.

“Those working in sexual health should have a high index of suspicion in all individuals presenting with genital and oral ulcers and those with proctitis,” he added.

During previous monkeypox outbreaks, the chain of household transmissions has been short, typically two or three people, said Chloe M. Orkin, MD, professor of HIV medicine at Queen Mary University of London. Dr. Orkin directs the Sexual Health and HIV All East Research (SHARE) Collaborative, which has worked to compile the international case series.

Though monkeypox has mainly been transmitted among men who have sex with men, not all identify as gay and some may also have female and nonbinary partners, Dr. Orkin said.

“Clinicians should bear this in mind when examining any person,” she said.

A version of this article first appeared on Medscape.com.