Penicillin as the Cornerstone of Managing Tooth Abscess and Syphilis in Pregnant Women

Antibiotic Choice and Rationale

The American College of Obstetricians and Gynecologists recommends administering penicillin G benzathine 2.4 million units IM in a single dose, followed by a second dose of 2.4 million units IM one week after the initial dose for primary, secondary, or early latent syphilis 5, 6
For late latent or unknown duration syphilis, administer penicillin G benzathine 7.2 million units in total, divided into three doses of 2.4 million units IM each, with weekly intervals 5, 6
Each injection should be spaced exactly 7 days apart, ensuring adequate treponemicidal coverage 7

The Centers for Disease Control and Prevention states that there are no proven alternatives to penicillin for the treatment of syphilis in pregnancy 5, 6
Pregnant women with a history of penicillin allergy should undergo skin testing and desensitization, followed by treatment with penicillin 5, 6
Never use tetracycline, doxycycline, or erythromycin in pregnancy: tetracyclines cause maternal hepatotoxicity and fetal tooth/bone staining, and erythromycin does not reliably cure fetal infection 6, 8

Repeat serologic titers in the third trimester and at delivery 5, 6
Verify titers monthly in women at high risk of reinfection or in areas with high syphilis prevalence 6, 8
The majority of women will give birth before the serologic response to treatment can be definitively evaluated 8

All pregnant women should be screened for syphilis at the first prenatal visit 5, 6
In high-risk populations or areas with high syphilis prevalence, perform additional screening at 28-32 weeks of gestation and at delivery 5, 6
Any woman who experiences stillbirth after 20 weeks of gestation should be tested for syphilis 5
No newborn should be discharged without documentation of the maternal serologic status for syphilis at least once during pregnancy 5, 6, 8

Treat presumed sexual partners exposed within 90 days prior to diagnosis, even if seronegative 5, 6
Offer HIV testing to all patients with syphilis 5, 8

Do not compare titers between different types of tests, as they are not directly comparable 7
Do not use non-penicillin regimens (erythromycin, tetracyclines, or other alternatives), as they do not prevent congenital syphilis 6