Provider Adherence to Syphilis Testing Guidelines Among Stillbirth Cases

Rising Stillbirth Rates Related to Congenital Syphilis in the United States From 2016 to 2022

OBJECTIVE

To identify trends in stillbirth rates attributed to congenital syphilis in the United States by describing congenital syphilis-related stillbirths and comparing characteristics of pregnant people who had congenital syphilis-related stillbirths with those of people who had preterm and full-term liveborn neonates with congenital syphilis.

METHODS

Cases of congenital syphilis reported to the Centers for Disease Control and Prevention during 2016-2022 were analyzed and categorized as stillbirth, preterm live birth (before 37 weeks of gestation), or term live birth (37 weeks or later). Cases with unknown vital status or gestational age were excluded. Frequencies were calculated by pregnancy outcome, including pregnant person demographics; receipt of prenatal care; syphilis stage and titer; and timing of prenatal care, testing, and treatment.

RESULTS

Overall, 13,393 congenital syphilis cases with vital status and gestational age were reported; of these, 853 (6.4%) were stillbirths. The number of congenital syphilis-related stillbirths increased each year (from 44 to 231); the proportion of congenital syphilis cases resulting in stillbirth ranged from 5.2% to 7.5%. Median gestational age at delivery for stillborn fetuses was 30 weeks (interquartile range 26-33 weeks). People with congenital syphilis-related stillbirths were more likely to have titers at or above 1:32 (78.9% vs 45.5%; P <.001) and to have received no prenatal care (58.4% vs 33.1%; P <.001) than people with liveborn neonates with congenital syphilis. The risk of stillbirth was twice as high in persons with secondary syphilis compared with those with primary syphilis (11.5% vs 5.7%, risk ratio 2.00; 95% CI, 1.27-3.13). Across all congenital syphilis cases, 34.2% of people did not have a syphilis test at their first prenatal visit.

CONCLUSION

Stillbirths occurred in more than 1 in 20 pregnancies complicated by congenital syphilis. Risk factors for stillbirth included high titers, secondary stage, and lack of prenatal care. If the prevalence of congenital syphilis continues to rise, there will be a corresponding increase in the overall stillbirth rate nationally.

Treatment Rates for Chlamydia trachomatis and Neisseria gonorrhoeae in a Metropolitan Area: Observational Cohort Analysis

BACKGROUND

Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (GC) are the 2 most common sexually transmitted infections (STIs) in the United States. The Centers for Disease Control and Prevention regularly publishes and updates STI Treatment Guidelines. The purpose of this study was to measure and compare treatment rates for CT and GC among public and private providers.

METHODS

Data from multiple sources, including electronic health records and Medicaid claims, were linked and integrated. Cases observed during 2016-2020 were defined based on positive laboratory results. We calculated descriptive statistics and odd ratios based on characteristics of providers and patients, stratifying by public versus private providers. Univariate logistic regression models were used to examine the factors associated with recommended treatment.

RESULTS

Overall, we found that 82.2% and 63.0% of initial CT and GC episodes, respectively, received Centers for Disease Control and Prevention-recommended treatment. The public STI clinic treated more than 90% of CT and GC cases consistently across the 5-year period. Private providers were significantly less likely to treat first episodes for CT (79.6%) and GC (53.3%; P < 0.01). Other factors associated with a higher likelihood of recommended treatment included being male, being HIV positive, and identifying as Black or multiracial. Among GC cases, 10.8% received nonrecommended treatment; all CT cases with treatment occurred per guidelines.

CONCLUSIONS

Although these treatment rates are higher than previous studies, there remain significant gaps in STI treatment that require intervention from public health.

The Mortality of Congenital Syphilis

OBJECTIVES

To document the case-fatality rate (CFR) of congenital syphilis diagnosed by molecular tools and rabbit infectivity testing (RIT) of clinical specimens in addition to standard evaluation and to compare that with the CFR using the Centers for Disease Control and Prevention (CDC) surveillance case definition.

STUDY DESIGN

Prospective, single site, cohort study of all cases of syphilis among mothers and their infants from 1984 to 2002. The diagnosis of congenital syphilis was determined using IgM immunoblotting, polymerase chain reaction, and RIT of fetal or infant specimens in addition to clinical, laboratory, and radiographic criteria. Data were retrospectively reviewed to ascertain fetal and neonatal mortality.

RESULTS

During the 18-year study, there were 191 cases of congenital syphilis confirmed by abnormalities on clinical, laboratory, or radiographic evaluation and/or positive serum IgM immunoblot, blood polymerase chain reaction, or blood/cerebrospinal fluid RIT. Of the 191 cases, 59 died for a CFR of 31%. Of the 59 deaths, 53 (90%) were stillborn and 6 (10%) died in the neonatal period. The majority (74%, 39/53) of stillbirths occurred in the third trimester. The CDC surveillance case definition correctly identified all infants with congenital syphilis, but the CDC CFR was 10% which underestimated the CFR by more than 300%.

CONCLUSIONS

Our findings corroborate the high sensitivity of the CDC surveillance definition for congenital syphilis but highlight its poor estimation of its associated mortality. The CFR among infected progeny of pregnant women with syphilis was 31%, due mostly to demise in the third trimester and as such highlights the need for detection and appropriate treatment of syphilis during pregnancy.

Syphilis testing adherence among women with livebirth deliveries: Indianapolis 2014-2016

BACKGROUND

The number of congenital syphilis (CS) cases in the United States are increasing. Effective prevention of CS requires routine serologic testing and treatment of infected pregnant women. The Centers for Disease Control and Prevention (CDC) recommends testing all pregnant women at their first prenatal visit and subsequent testing at 28 weeks gestation and delivery for women at increased risk.

METHODS

We conducted a cross-sectional cohort study of syphilis testing among pregnant women with a livebirth delivery from January 2014 to December 2016 in Marion County, Indiana. We extracted and linked maternal and infant data from the vital records in a local health department to electronic health records available in a regional health information exchange. We examined syphilis testing rates and factors associated with non-testing among women with livebirth delivery. We further examined these rates and factors among women who reside in syphilis prevalent areas.

RESULTS

Among 21260 pregnancies that resulted in livebirths, syphilis testing in any trimester, including delivery, increased from 71.7% in 2014 to 86.6% in 2016. The number of maternal syphilis tests administered only at delivery decreased from 16.6% in 2014 to 4.04% in 2016. Among women living in areas with high syphilis rates, syphilis screening rates increased from 79.6% in 2014 to 94.2% in 2016.

CONCLUSION

Improvement in prenatal syphilis screening is apparent and encouraging, yet roughly 1-in-10 women do not receive syphilis screening during pregnancy. Adherence to recommendations set out by CDC improved over time. Given increasing congenital syphilis cases, the need for timely diagnoses and prevention of transmission from mother to fetus remains a priority for public health.

A New Call to Action to Combat an Old Nemesis: Addressing Rising Congenital Syphilis Rates in the United States

Congenital syphilis (CS) is on the rise in the United States and is a growing public health concern. CS is an infection with Treponema pallidum in an infant or fetus, acquired via transplacental transmission when a pregnant woman has untreated or inadequately treated syphilis. Pregnant women with untreated syphilis are more likely to experience pregnancies complicated by stillbirth, prematurity, low birth weight, and early infant death, while their children can develop clinical manifestations of CS such as hepatosplenomegaly, bone abnormalities, developmental delays, and hearing loss. One of the ways CS can be prevented is by identifying and treating infected women during pregnancy with a benzathine penicillin G regimen that is both appropriate for the maternal stage of syphilis and initiated at least 30 days prior to delivery. In this article we discuss many of the challenges faced by both public health and healthcare systems with regards to this preventable infection, summarize missed opportunities for CS prevention, and provide practical solutions for future CS prevention strategies.