Syphilis. It is often called the “great imitator.” It is speculated that this infection led to King George III of England going mad and likely contributing to his death. In the modern era, the discovery of penicillin in 1928 was instrumental in treating this once-deadly infection. Over the ensuing decades, rates of syphilis continued to decline. However, according to the Centers for Disease Control and Prevention, from 2018-2022 reported cases of syphilis in the United States have increased by 79% and continue to increase each year. Men who have sex with men (MSM) accounted for 41.4% of infections nationwide during this time period. This extraordinary rise highlights the need for better screening in our patients.
I currently live and practice in Texas, so I will use it as a case example. In 2013, Texas reported 1,471 cases of primary or secondary syphilis. By 2022, this number had risen to 4,655, a 216% increase. CDC data shows that Texas cases among men increased from 1,917 in 2019 to 3,324 in 2022, with MSM accounting for 1,341 (40%) of those infections. Adolescents and young adults aged 15-24 accounted for the second-highest number of new infections. Interestingly, rates of syphilis in men began to rise in Texas starting in 2013, the first full year that Truvada (emtricitabine and tenofovir disoproxil fumarate) was available for HIV pre-exposure prophylaxis (PrEP). While no definitive study has proven that the availability of PrEP caused an increase in condomless sexual intercourse, the number of high school students in Texas who did not use a condom at their last intercourse increased from 47.1% in 2013 to 50% in 2021.
UT Southwestern Medical Center
Dr. M. Brett Cooper
The data above highlights the need to increase screening, especially in primary care and emergency room settings. According to the 2021 Youth Risk Behavior Survey, 94.8% of high school students surveyed that they were not tested for STIs in the 12 months prior to the survey. This compares with 91.4% in the 2019 survey. When STI testing is done, many adolescents often choose to forgo blood testing for HIV and syphilis and decide only to do urine NAATs testing for Neisseria gonorrhoeae and Chlamydia trachomatis. Therefore, those physicians and other healthcare providers who take care of adolescents and young adults must work to improve screening for ALL STIs. According to the American Academy of Pediatrics Bright Futures Periodicity Guidelines, pediatricians should screen for HIV in all patients at least once starting at age 15 and then thereafter based on risk assessment. Adding syphilis screening at the same time as the above HIV screening is an easy way to improve testing and treatment for this potentially deadly condition. If access to phlebotomy is not available, there are rapid HIV and syphilis tests that can be done in physicians’ offices. To perform these risk assessments, pediatricians must spend time alone with their adolescent and young patients at nearly every visit to discuss behaviors. Pediatricians should also be aware to consider syphilis on their differential for patients with unexplained rashes, sores in the mouth, or flu-like symptoms if that young person is sexually active.
Compounding the issue of increasing cases of syphilis is a national shortage of intramuscular penicillin G benzathine, the preferred treatment, which began in April 2023 only recently began to improve as of August 2024. Oral doxycycline can be used as a backup for some patients. Still, IM penicillin G is the only recommended treatment available for pregnant patients or those with advanced disease. The increasing number of cases, as well as the medication shortages, remind all of us that
Dr. M. Brett Cooper, is an assistant professor of pediatrics at University of Texas Southwestern, Dallas, and an adolescent medicine specialist at Children’s Medical Center Dallas.