Lumbar puncture is warranted for evaluation of cerebrospinal fluid if neurologic symptoms are present but is not necessary for isolated ocular syphilis or otosyphilis without neurologic findings. Treatment should not be delayed for test results if ocular syphilis is suspected because permanent blindness can develop. Any patient at high risk for an STI who presents with neurologic or ophthalmologic symptoms should be tested for syphilis and HIV.45
Pregnant women who have a diagnosis of syphilis should be treated with penicillin immediately because treatment ≥ 30 days prior to delivery is likely to prevent most cases of congenital syphilis. However, a course of penicillin might not prevent stillbirth or congenital syphilis in a gravely infected fetus, evidenced by fetal syphilis on a sonogram at the time of treatment. Additional doses of penicillin in pregnant women with early syphilis might be indicated if there is evidence of fetal syphilis on ultrasonography. All women who deliver a stillborn infant (≥ 20 weeks’ gestation) should be tested for syphilis at delivery.46
All patients in whom primary or secondary syphilis has been diagnosed should be tested for HIV at the time of diagnosis and treatment; if the result is negative, they should be offered preexposure prophylaxis (PrEP; discussed shortly). If the incidence of HIV in your community is high, repeat testing for HIV in 3 months. Clinical and serologic evaluation should be performed 6 and 12 months after treatment.47
Treatment.Penicillin remains the standard treatment for syphilis. Primary, secondary, and early tertiary stages (including in pregnancy) are treated with benzathine penicillin G 2.4 million units intramuscular (IM) in a single dose. For pregnant patients, repeating that dose in 1 week generally is recommended. Patients in the late latent (> 1 year) or tertiary stage receive the same dose of penicillin, which is then repeated weekly, for a total of 3 doses. Doxycycline and ceftriaxone are alternatives, except in pregnancy.
Antivirals will not eradicate latent herpesvirus; rather, the goals of treatment are to attenuate current infection, prevent recurrence, and improve quality of life.
Warn patients of the Jarisch-Herxheimer reaction: fever, headache, and myalgias associated with initiation of treatment in the presence of the high bacterial load seen in early syphilis. Treatment is symptomatic, but the Jarisch-Herxheimer reaction can cause fetal distress in pregnancy.
Otosyphilis, ocular syphilis, and neurosyphilis require intravenous (IV) aqueous crystalline penicillin G 3 to 4 million U every 4 hours for 10 to 14 days.45 Alternatively, procaine penicillin G 2.4 million U/d IM can be given daily with oral probenecid 500 mg qid, both for 10 to 14 days (TABLE 214).
Screening andprevention of STIs
Screening recommendations
Follow USPSTF screening guidelines for STIs.10,48-54 Screen annually for:
gonorrhea and chlamydia in women ages 15 to 24 years and in women older than 25 years if they are at increased risk
gonorrhea, chlamydia, syphilis, and HIV in MSM, and hepatitis C if they are HIV positive
