Syphilis Treatment Among People Who Are Pregnant in Six U.S. States, 2018-2021

OBJECTIVE

To describe syphilis treatment status and prenatal care among people with syphilis during pregnancy to identify missed opportunities for preventing congenital syphilis.

METHODS

Six jurisdictions that participated in SET-NET (Surveillance for Emerging Threats to Pregnant People and Infants Network) conducted enhanced surveillance among people with syphilis during pregnancy based on case investigations, medical records, and linkage of laboratory data with vital records. Unadjusted risk ratios (RRs) were used to compare demographic and clinical characteristics by syphilis stage (primary, secondary, or early latent vs late latent or unknown) and treatment status during pregnancy (adequate per the Centers for Disease Control and Prevention's "Sexually Transmitted Infections Treatment Guidelines, 2021" vs inadequate or not treated) and by prenatal care (timely: at least 30 days before pregnancy outcome; nontimely: less than 30 days before pregnancy outcome; and no prenatal care).

RESULTS

As of September 15, 2023, of 1,476 people with syphilis during pregnancy, 855 (57.9%) were adequately treated and 621 (42.1%) were inadequately treated or not treated. Eighty-two percent of the cohort received timely prenatal care. Although those with nontimely or no prenatal care were more likely to receive inadequate or no treatment (RR 2.50, 95% CI, 2.17-2.88 and RR 2.73, 95% CI, 2.47-3.02, respectively), 32.1% of those with timely prenatal care were inadequately or not treated. Those with reported substance use or a history of homelessness were nearly twice as likely to receive inadequate or no treatment (RR 2.04, 95% CI, 1.82-2.28 and RR 1.83, 95% CI, 1.58-2.13, respectively).

CONCLUSION

In this surveillance cohort, people without timely prenatal care had the highest risk for syphilis treatment inadequacy; however, almost a third of people who received timely prenatal care were not adequately treated. These findings underscore gaps in syphilis screening and treatment for pregnant people, especially those experiencing substance use and homelessness, and the need for systems-based interventions, such as treatment outside of traditional prenatal care settings.

Congenital Syphilis Prevention Challenges, Pacific Coast of Colombia, 2018-2022

High incidences of congenital syphilis have been reported in areas along the Pacific coast of Colombia. In this retrospective study, conducted during 2018-2022 at a public hospital in Buenaventura, Colombia, we analyzed data from 3,378 pregnant women. The opportunity to prevent congenital syphilis was missed in 53.1% of mothers because of the lack of syphilis screening. Characteristics of higher maternal social vulnerability and late access to prenatal care decreased the probability of having >1 syphilis screening test, thereby increasing the probability of having newborns with congenital syphilis. In addition, the opportunity to prevent congenital syphilis was missed in 41.5% of patients with syphilis because of the lack of treatment, which also increased the probability of having newborns with congenital syphilis. We demonstrate the urgent need to improve screening and treatment capabilities for maternal syphilis, particularly among pregnant women who are more socially vulnerable.

Provider-Reported Barriers in Sexual Health Care Services for Women With Upstream Barriers: The Case of Syphilis and Congenital Syphilis in Southern Colorado, 2022

BACKGROUND

Syphilis and congenital syphilis rates have increased sharply in Colorado in the past 5 years. Congenital syphilis is passed during pregnancy in utero and can cause lifelong physical, developmental, and neurologic problems for the child, or can lead to miscarriage, stillbirth, or early infant death. Congenital syphilis is easily prevented if the mother receives timely testing, treatment, and prenatal care. Providers can play a key role in preventing congenital syphilis for women with social vulnerabilities, who have a higher likelihood of syphilis and/or congenital syphilis infection.

METHODS

We surveyed 23 and interviewed 4 health care providers in southern Colorado in 2022 to record their experiences in providing sexual health care services. We asked providers with direct care experience about perceived barriers in effectively treating syphilis.

RESULTS

The most significant barriers reported in the survey were the cost of treatment (26%) and the loss to follow-up (22%). Interviews revealed further challenges, including discretionary testing procedures, delays in screening results, treatment referral issues, and stigma around substance use and sexual activity.

CONCLUSIONS

Elevated syphilis and congenital syphilis rates pose significant public health challenges. Coordinated interventions are necessary to effectively reduce the transmission of syphilis and congenital syphilis among women with upstream barriers. Potential care solutions include expanding rapid, point-of care testing and treatment options, supporting bicillin delivery or web-based inventory systems, offering anti-stigma training for providers, offering mental and behavioral health resources at providers' clinics, and expanding partnerships with syringe access programs.

Health care of sexual partners of adolescents with gestational syphilis and their children: an integrative review

Gestational syphilis (GS) in adolescents is a challenge for Brazilian public health, with high incidence rates. Testing, diagnosis and treatment of sexual partners is essential to interrupt the chain of transmission, but since 2017 it is no longer a criterion for the proper treatment of pregnant women. We sought to analyze and synthesize the knowledge produced about the health care of sexual partners of adolescents with GS in Brazil. We carried out a systematic review in the BVS, SciELO and PubMed databases, selecting articles that addressed GS and/or congenital syphilis (CS) in adolescents aged 15 to 19 years and that included information about sexual partners. Forty-one articles were comprehensively analyzed using the WebQDA software and classified into two categories: a) Approach to sexual partners during prenatal care, and b) The role of sexual partners in the transmission cycle of GS and CS. The studies show that the partner's approach is deficient, with a lack of data on the sociodemographic profile and information on testing and treatment. In the context of Primary Health Care, there are no studies that address factors inherent to the context of vulnerability of sexual partners in relation to coping with syphilis.

Development and validation of an individualised nomogram to predict mother-to-child transmission in pregnant women with syphilis in China: a retrospective cohort study

OBJECTIVES

The elimination of mother-to-child transmission (MTCT) of syphilis has been set as a public health priority. However, an instrument to predict the MTCT of syphilis is not available. We aimed to develop and validate an intuitive nomogram to predict the individualised risk of MTCT in pregnant women with syphilis in China.

DESIGN

Retrospective cohort study.

SETTING

Data was acquired from the National Information System of Prevention of MTCT of Syphilis in Guangdong province between 2011 and 2020.

PARTICIPANTS

A total of 13 860 pregnant women with syphilis and their infants were included and randomised 7:3 into the derivation cohort (n=9702) and validation cohort (n=4158).

PRIMARY OUTCOME MEASURES

Congenital syphilis.

RESULTS

Among 13 860 pregnant women with syphilis and their infants included, 1370 infants were diagnosed with congenital syphilis. Least absolute shrinkage and selection operator regression and multivariable logistic regression showed that age, ethnicity, registered residence, marital status, number of pregnancies, transmission route, the timing of syphilis diagnosis, stage of syphilis, time from first antenatal care to syphilis diagnosis and toluidine red unheated serum test titre were predictors of MTCT of syphilis. A nomogram was developed based on the predictors, which demonstrated good calibration and discrimination with an area under the curve of the receiver operating characteristic of 0.741 (95% CI: 0.728 to 0.755) and 0.731 (95% CI: 0.710 to 0.752) for the derivation and validation cohorts, respectively. The net benefit of the predictive models was positive, demonstrating a significant potential for clinical decision-making. We have also developed a web calculator based on this prediction model.

CONCLUSIONS

Our nomogram exhibited good performance in predicting individualised risk for MTCT of syphilis, which may help guide early and personalised prevention for MTCT of syphilis.

Gaps in the prevention of mother-to-child transmission of syphilis: a review of reported cases, South Africa, January 2020-June 2022

INTRODUCTION

Congenital syphilis (CS) is preventable through timely antenatal care (ANC), syphilis screening and treatment among pregnant women. Robust CS surveillance can identify gaps in this prevention cascade. We reviewed CS cases reported to the South African notifiable medical conditions surveillance system (NMCSS) from January 2020 to June 2022.

METHODS

CS cases are reported using a case notification form (CNF) containing limited infant demographic and clinical characteristics. During January 2020-June 2022, healthcare workers supplemented CNFs with a case investigation form (CIF) containing maternal and infant testing and treatment information. We describe CS cases with/without a matching CIF and gaps in the CS prevention cascade among those with clinical information.

FINDINGS

During January 2020-June 2022, 938 CS cases were reported to the NMCSS with a median age of 1 day (interquartile range: 0-5). Nine percent were diagnosed based on clinical signs and symptoms only. During January 2020-June 2022, 667 CIFs were reported with 51% (343) successfully matched to a CNF. Only 57% of mothers of infants with a matching CIF had an ANC booking visit (entry into ANC). Overall, 87% of mothers were tested for syphilis increasing to 98% among mothers with an ANC booking visit. Median time between first syphilis test and delivery was 16 days overall increasing to 82 days among mothers with an ANC booking visit.

DISCUSSION

Only 37% of CS cases had accompanying clinical information to support evaluation of the prevention cascade. Mothers with an ANC booking visit had increased syphilis screening and time before delivery to allow for adequate treatment.

Update on syphilis in pregnancy: marrying basic science advances and clinical perseverance to solve an ancient public health problem

PURPOSE OF REVIEW

While the clinical disease of syphilis, its consequences in pregnancy, and its sensitivity to penicillin treatment have remained relatively unchanged for a century or more, new technologies and basic discoveries in syphilis research have translated into tangible advances in clinical diagnosis, treatment, and prevention. The purpose of this review is to help the reader understand some of the recent relevant scientific publications on syphilis and its causative organism in a clinical obstetric context.

RECENT FINDINGS

Rates of adult and congenital syphilis have risen dramatically in the last decade despite public health efforts. Penicillin shortages and lack of screening or adequate treatment have all contributed to global disease burden. Advances in genomic and microbiological characterization of this spirochete have led to new developments in serologic and molecular diagnosis as well as evaluation of potential vaccine candidates. Until a syphilis vaccine is available, substance use disorders and lack of screening in pregnancy are associated with increased congenital syphilis, and these challenges will require novel solutions to fully address this public health crisis.

SUMMARY

Addressing the burden of congenital syphilis demands that obstetricians stay well informed of new tools and resources for diagnosis, treatment, and prevention of syphilis now and in the future.

Clinical-Demographic and Laboratory Profile of the Mother-Child Binomial With Syphilis in a Tertiary-Level Hospital in Mexico

BACKGROUND

Congenital syphilis (CS) remains a major public health problem, and its incidence is increasing worldwide.

METHODS

Retrospective, observational, and descriptive study of cases with CS and their mothers at a tertiary-level hospital in Mexico from 2017 to 2022. Medical records of patients with CS and a structured collection of epidemiological, clinical, and laboratory data were analyzed and classified in the Centers for Disease Control scenarios as confirmed, probable, less probable, or unlikely.

RESULTS

One hundred eighty cases were diagnosed with a compatible definition of congenital syphilis, and we identified 43 (21.21%) confirmed proven. Among those proven cases, 15.6% had hematological, 13.3% skin, 12.2% liver, 6.7% pulmonary, 6.6% neurological, 5.8% eye, 5.6% bone, and 0.6% hearing involvements. According to the clinical stages of maternal syphilis, 119 (66.1%) were in the late latent phase, 49 (27.2%) in the early latent phase, 7 (3.9%) in the secondary stage, and 5 (2.8%) in the primary stage. Mothers with tertiary syphilis were not detected.

CONCLUSION

Regardless of negative antenatal screening, health care workers should consider the diagnosis of congenital syphilis. Infants are still undiagnosed at birth, and only a tiny percentage exhibits symptoms. The wide range of clinical manifestations of this preventable infection can be misdiagnosed for various other diseases, causing diagnostic delays that can have serious consequences.

The Congenital Syphilis Prevention Cascade: Reimagining a Missed Prevention Opportunities Framework for Effective Intervention

ABSTRACT

Congenital syphilis (CS) rates have risen in the United States since 2013. Prevention of CS requires testing and treatment of pregnant and pregnancy-capable persons at high risk for syphilis. We developed a CS Prevention Cascade to assess how effectively testing and treatment interventions reached pregnant persons with a CS outcome.

Resurgence of congenital syphilis: new strategies against an old foe

Congenital syphilis is a major global cause of fetal loss, stillbirth, neonatal death, and congenital infection. In 2020, the global rate of congenital syphilis was 425 cases per 100 000 livebirths-substantially higher than WHO's elimination target of 50 cases per 100 000 livebirths. Case rates are rising in many high-income countries, but remain low compared with those in low-income and middle-income settings. This Review aims to summarise the current epidemiology and knowledge on transmission and treatment of syphilis in pregnancy, and proposes measures to reduce the rising incidence seen worldwide. We also describe emerging diagnostic and treatment tools to prevent vertical transmission and improve management of congenital syphilis. Finally, we outline a programme of public health priorities, which include research, clinical, and preventive strategies.

Evaluating the effect of the plan of national syphilis control in controlling the syphilis epidemic in Jiangsu, China 2010-2020

Background

Starting in 2010, the Chinese government initiated a 10-year syphilis control plan, called the national syphilis control plan (NSCP), to address the emerging threat of syphilis. We aimed to evaluate the effect of the NSCP plan on syphilis control in Jiangsu, China.

Methods

The temporal trends of syphilis incidence, prevalence and rate of condom use were estimated by Joinpoint regression with average annual percent change (APC) and average annual percentage (APPC). A Chi-square test was conducted to analyze the outcomes in different subgroups. ArcGIS was used to analyze the spatiotemporal distribution of syphilis incidence.

Results

Geographically, early and congenital syphilis incidence decreased significantly in all areas of the province during the period of NSCP. Early syphilis incidence decreased from 21.1 to 8.8 (APC: -7.5, 95%CI: -8.6, -6.5, p < 0.001) per 100,000 people, and congenital syphilis decreased from 63.6 to 4.1 (APC: -14.8, 95%CI: -20.8, -8.4, p < 0.01) per 100,000 newborns from 2010 to 2020. Also, syphilis prevalence reduced from 13.4 to 3.8% (APC: -8.7, 95%CI: -12.1, -5.0, p = 0.001) among men who have sex with men, from 5.3 to 1.7% (APC: -7.9, 95%CI: -11.7, -3.8, p = 0.002) among female sex workers and remained under 1.0% with slight variations among pregnant women (APC: 0.3, 95%CI: -4.3, 5.1, p = 0.877) from 2010 to 2020. 0.2% (2,436) of pregnant women who received free syphilis testing during pregnancy were diagnosed with current syphilis infection, and 97.0% (2,555) of newborns in the province were delivered to women diagnosed with syphilis. 91.8% (2,346) of live babies and about 90% of diagnosed patients received complete standard syphilis diagnosis and treatment services.

Conclusion

Trends of early syphilis incidence and syphilis prevalence show a considerable decreasing trend among almost all the key populations after implementing NSCP. Congenital syphilis has significantly decreased as well and hence, the NSCP program should be sustained and strengthened to control the syphilis epidemic in China further.

Congenital syphilis in Switzerland: a retrospective cohort study, 2010 to 2019

AIMS OF THE STUDY

We previously reported a re-emergence of syphilis from 2006 to 2009 with detection of congenital syphilis in Switzerland. This study aimed to reassess the incidence of children exposed to maternal syphilis during pregnancy and congenital syphilis in a following 10-year period in the canton of Zurich, the most populous canton in Switzerland with the highest incidences of syphilis.

METHODS

Children were identified both by reviewing medical records at the four major neonatal and paediatric hospitals providing acute care in the canton of Zurich and by the serological database of the syphilis reference laboratory. Inclusion criteria for children were (a) date of birth in the period 2010-2019, (b) place of birth in the canton of Zurich, (c) evaluation for syphilis due to positive syphilis pregnancy screening and (d) age <1 year at diagnosis. Results were compared with epidemiological data provided by the Federal Office of Public Health (FOPH).

RESULTS

We identified and evaluated 17 children after potential exposure to maternal syphilis. Residual antibodies of a past infection were found in 11 mothers. Six children were identified as having had real exposure to asymptomatic maternal syphilis. From an epidemiological perspective, the distribution of the cases followed a similar pattern as confirmed syphilis cases in women of childbearing age reported to the FOPH. No cases of congenital syphilis were observed.

CONCLUSIONS

In contrast to the rise in syphilis infections, this study identified no cases of congenital syphilis in the canton of Zurich, Switzerland, in the period 2010-2019. Syphilis pregnancy screening may have prevented congenital syphilis by diagnosing and allowing adequate treatment of asymptomatic maternal syphilis.

Vital Signs: Missed Opportunities for Preventing Congenital Syphilis - United States, 2022

Introduction

Congenital syphilis cases in the United States increased 755% during 2012-2021. Syphilis during pregnancy can lead to stillbirth, miscarriage, infant death, and maternal and infant morbidity; these outcomes can be prevented through appropriate screening and treatment.

Methods

A cascading framework was used to identify and classify missed opportunities to prevent congenital syphilis among cases reported to CDC in 2022 through the National Notifiable Diseases Surveillance System. Data on testing and treatment during pregnancy and clinical manifestations present in the newborn were used to identify missed opportunities to prevent congenital syphilis.

Results

In 2022, a total of 3,761 cases of congenital syphilis in the United States were reported to CDC, including 231 (6%) stillbirths and 51 (1%) infant deaths. Lack of timely testing and adequate treatment during pregnancy contributed to 88% of cases of congenital syphilis. Testing and treatment gaps were present in the majority of cases across all races, ethnicities, and U.S. Census Bureau regions.

Conclusions and implications for public health practice

Addressing missed opportunities for prevention, primarily timely testing and appropriate treatment of syphilis during pregnancy, is important for reversing congenital syphilis trends in the United States. Implementing tailored strategies addressing missed opportunities at the local and national levels could substantially reduce congenital syphilis.

Congenital syphilis: performance of primary care services in São Paulo, 2017

OBJECTIVE

To evaluate congenital syphilis prevention actions in primary health care services in the state of São Paulo.

METHODS

Cross-sectional evaluative research that used indicators extracted from the Survey of Evaluation and Monitoring of Primary Care Services ( Avaliação e Monitoramento de Serviços da Atenção Básica - QualiAB) in the state of São Paulo in 2017. An evaluative matrix composed of 31 indicators of prevention of congenital syphilis, categorized into four domains of analysis: diagnosis and treatment of acquired syphilis (10); basic infrastructure and resources (7); prevention of congenital syphilis during prenatal care (7); and educational actions and prevention of sexually transmitted infections (7). The frequency of services with positive responses for each indicator and the percentage of service performance were calculated based on the proportion of indicators reported per service and the overall average observed. Subsequently, services were classified into four quality groups, and associations between groups and each indicator, type of organizational arrangement and location were estimated.

RESULTS

2,565 services participated, located in 503 municipalities, with an overall average performance of 74.9%. The domain "diagnosis and treatment of acquired syphilis" had the highest performance (89.8%), followed by "infrastructure and basic resources" (79.5%), "prevention of congenital syphilis in prenatal care" (73.3%) and "educational actions and prevention of sexually transmitted infections" (56.8%). There was a significant difference between quality groups and all indicators and types of organizational arrangements.

CONCLUSIONS

The evaluated services have limitations in the development of actions to prevent congenital syphilis, mainly related to health education and actions included in prenatal care, such as screening and adequate treatment of pregnant women and their partners. Changes are needed in the work process, with the expansion of educational and surveillance actions, as well as the qualification of the teams to effectively comply with the protocols.

Maternal and congenital syphilis attributable to ethnoracial inequalities: a national record-linkage longitudinal study of 15 million births in Brazil

BACKGROUND

This study estimated ethnoracial inequalities in maternal and congenital syphilis in Brazil, understanding race as a relational category product of a sociopolitical construct that functions as an essential tool of racism and its manifestations.

METHODS

We linked routinely collected data from Jan 1, 2012 to Dec 31, 2017 to conduct a population-based study in Brazil. We estimated the attributable fraction of race (skin colour) for the entire population and specific subgroups compared with White women using adjusted logistic regression. We also obtained the attributable fraction of the intersection between two social markers (race and education) and compared it with White women with more than 12 years of education as the baseline.

FINDINGS

Of 15 810 488 birth records, 144 564 women had maternal syphilis and 79 580 had congenital syphilis. If all women had the same baseline risk as White women, 35% (95% CI 34·89-36·10) of all maternal syphilis and 41% (40·49-42·09) of all congenital syphilis would have been prevented. Compared with other ethnoracial categories, these percentages were higher among Parda/Brown women (46% [45·74-47·20] of maternal syphilis and 52% [51·09-52·93] of congenital syphilis would have been prevented) and Black women (61% [60·25-61·75] of maternal syphilis and 67% [65·87-67·60] of congenital syphilis would have been prevented). If all ethnoracial groups had the same risk as White women with more than 12 years of education, 87% of all maternal syphilis and 89% of all congenital syphilis would have been prevented.

INTERPRETATION

Only through effective control of maternal syphilis among populations at higher risk (eg, Black and Parda/Brown women with lower educational levels) can WHO's global health initiative to eliminate mother-to-child transmission of syphilis be made feasible. Recognising that racism and other intersecting forms of oppression affect the lives of minoritised groups and advocating for actions through the lens of intersectionality is imperative for attaining and guaranteeing health equity. Achieving health equality needs to be addressed to achieve syphilis control. Given the scale and complexity of the problem (which is unlikely to be unique to Brazil), structural issues and social markers of oppression, such as race and education, must be considered to prevent maternal and congenital syphilis and improve maternal and child outcomes globally.

FUNDING

Wellcome Trust, CNPq-Brazil.

TRANSLATION

For the Portuguese translation of the abstract see Supplementary Materials section.

Case Series of Stillbirths Due to Syphilis in Edmonton, Alberta, Canada

BACKGROUND

Data on the incidence and characteristics of stillbirths attributed to congenital syphilis were collected.

METHODS

We extracted data on stillbirths in the Edmonton Zone on January 1, 2015, through June 30, 2021, born to persons diagnosed with infectious syphilis (primary, secondary, early latent, or early neurosyphilis) during pregnancy or at the time of delivery.

RESULTS

Of 314 infants documented to be exposed to infectious syphilis during gestation, 16 (5.1%) were stillborn. Three of the 16 females with stillbirths were diagnosed with syphilis during pregnancy but not treated, 12 were diagnosed only at the time of stillbirth (1 of whom was treated early in pregnancy and presumably reinfected), and 1 had a stillbirth in the week after one dose of benzathine penicillin G.

CONCLUSIONS

Stillbirths due to congenital syphilis were all due to failure to treat syphilis in pregnancy. Innovative strategies to prevent syphilis in the community and to reach those experiencing barriers to care are urgently required to not miss opportunities to diagnose and treat syphilis as early as possible during pregnancy.

Congenital Syphilis: a Review of Global Epidemiology

In 2007, the World Health Organization (WHO) launched a global health initiative for the elimination of mother-to-child transmission (MTCT) of syphilis. This condition is highly preventable through antenatal identification of syphilis infection and treatment with penicillin during pregnancy. This review summarizes the global status of MTCT of syphilis and concludes that this condition remains a significant issue worldwide. There are large variations in case rates by region, with the highest numbers of cases in the African and Eastern Mediterranean regions, where there are also the least data available. There are also pockets of high-incidence areas within the other regions. Although the general trend is of decreasing rates over time, there are concerning indications of consistently increasing congenital syphilis cases in some areas, particularly in areas which have previously had very low case numbers. A concerted effort will be required to achieve the 2007 WHO goal of worldwide elimination of MTCT of syphilis in the near future.

Expanded prenatal syphilis screening in Manitoba, Canada: a direct short-term cost-avoidance analysis in an outbreak context

OBJECTIVE

The objective of this study is to provide a direct short-term cost-avoidance analysis of expanded three-time prenatal syphilis screening in the context of Manitoba's ongoing outbreak.

METHODS

A conservative modelling approach increased all financial costs of prenatal screening and minimized the direct costs of congenital syphilis treatment. The cost of syphilis screening was calculated using instrument, reagent and consumable costs as well as laboratory overhead and labour costs as documented by Cadham Provincial Laboratory. The short-term direct costs of treating congenital syphilis were calculated using hospital costs and doctor's billing fees. All costs were calculated in 2021 Canadian dollars. These numbers were applied to Manitoba's 2021 congenital syphilis statistics to provide a pragmatic cost-avoidance analysis.

RESULTS

The cost of applying three-time prenatal syphilis screening to all 16,800 yearly pregnancies in Manitoba equalled CAD $139,608.00 per year. The direct short-term cost of treating one uncomplicated case of congenital syphilis was $18,151.40. As 81 cases of congenital syphilis were treated in Manitoba in 2021, the short-term direct cost of treating congenital syphilis in Manitoba in 2021 was $1,470,263.40. Applying screening costs to the 125 adequately prevented cases of congenital syphilis in 2021, the screening program is associated with a cost-avoidance ratio of 16.25. If no prenatal syphilis program existed in Manitoba, an expanded screening program would be associated with a cost-avoidance ratio of 26.8.

CONCLUSION

Expanding prenatal syphilis screening is highly cost-avoidant in Manitoba. The 81 cases of congenital syphilis treated in Manitoba in 2021 highlight the need for novel community-based approaches to increase accessibility and engagement with prenatal care.

Substance Use Among Persons with Syphilis During Pregnancy - Arizona and Georgia, 2018-2021

Despite universal prenatal syphilis screening recommendations and availability of effective antibiotic treatment, syphilis prevalence during pregnancy and the incidence of congenital syphilis have continued to increase in the United States (1,2). Concurrent increases in methamphetamine, injection drug, and heroin use have been described in women with syphilis (3). CDC used data on births that occurred during January 1, 2018-December 31, 2021, from two states (Arizona and Georgia) that participate in the Surveillance for Emerging Threats to Pregnant People and Infants Network (SET-NET) to describe the prevalence of substance use among pregnant persons with syphilis by congenital syphilis pregnancy outcome (defined as delivery of a stillborn or live-born infant meeting the surveillance case definition for probable or confirmed congenital syphilis). The prevalence of substance use (e.g., tobacco, alcohol, cannabis, illicit use of opioids, and other illicit, nonprescription substances) in persons with a congenital syphilis pregnancy outcome (48.1%) was nearly double that among those with a noncongenital syphilis pregnancy outcome (24.6%). Persons with a congenital syphilis pregnancy outcome were six times as likely to report illicit use of opioids and four times as likely to report using other illicit, nonprescription substances during pregnancy than were persons with a noncongenital syphilis pregnancy outcome. Approximately one half of persons who used substances during pregnancy and had a congenital syphilis pregnancy outcome had late or no prenatal care. Tailored interventions should address barriers and facilitators to accessing screening and treatment for syphilis among persons who use substances. The need for syphilis screening and treatment should be addressed at any health care encounter during pregnancy, especially among persons who use substances.

Challenges and outcomes of implementing a national syphilis follow-up system for the elimination of congenital syphilis in Cambodia: a mixed-methods study

OBJECTIVES

We aimed to describe the challenges and outcomes of implementing a national syphilis follow-up system to improve syphilis management in maternal and child health (MCH) services in Cambodia.

DESIGN

Operational study; quantitative cohort data and cross sectional qualitative data.

SETTING

Public health facilities at national level and in four provinces with high syphilis prevalence in Cambodia.

PARTICIPANTS

Pregnant women screened for syphilis; MCH health care providers and managers.

METHODS

We conducted an operational research using syphilis screening and treatment data collected from a national follow-up system (cohort data) and reported in the health management information system (HMIS) between 2019 and 2020. We also conducted indepth interviews with 16 pregnant women and focus group discussions with 37 healthcare providers and managers. Descriptive statistics and thematic content analysis were used.

OUTCOME MEASURES

Syphilis testing and treatment results and perceptions regarding these services.

RESULTS

A total of 470 pregnant women who tested positive in rapid syphilis testing were recorded in the national syphilis follow-up system in 2019-2020. Of these, 71% (332 of 470) received a rapid plasma reagin (RPR) test and 95% (n=315) tested positive; 78% (246 of 315) received any syphilis treatment and only 28% (88 of 315) were treated adequately with benzathine penicillin G (BPG). Data from four provinces with high syphilis prevalence (more closely monitored) showed higher testing and treatment rates than at the national level. HMIS aggregated data reported a higher number of pregnant women screened and treated for syphilis than the follow-up system during the same period. Barriers to syphilis testing and treatment included late antenatal care, long distance to RPR testing and treatment, partners' lack of support to reach the health facility, BPG stockout and poor adherence to oral treatment in the absence of BPG. Providers and managers reported a lack of communication across services, insufficient skills to treat infants and absence of clear guidance regarding the revised follow-up system. Study findings contributed to changes in operating procedures nationwide to facilitate access to syphilis testing and adequate treatment and a systematic follow-up of pregnant women and exposed infants.

CONCLUSIONS

Study results contributed to informing improvements to syphilis management in MCH services in Cambodia.

Missed opportunities for screening congenital syphilis early during pregnancy: A case report and brief literature review

Congenital syphilis is a significant public health problem. Pregnant women infected with Treponema pallidum present with various clinical manifestations, mainly including skin or visceral manifestations. The extensive clinical manifestations of T. pallidum infection mimic those of many other diseases during pregnancy, which may lead to delayed diagnosis and serious consequences. We report a case of fetal T. pallidum infection and premature delivery in a woman whose syphilis screening was negative at 16 weeks of gestation. Despite presenting to the dermatologist at 24 weeks of gestation with maculopapular rash which is usually associated with secondary syphilis, the diagnosis of syphilis was not considered. This case shows that even if early syphilis screening of pregnant women is negative, they may still get infected with T. pallidum later on in pregnancy. Therefore, in patients presenting with a rash without an obvious cause, T. pallidum infection should be excluded. The health status of patients' spouses should be assessed during pregnancy. Additionally, perinatal health education is necessary for women and their spouses during pregnancy. The abovementioned factors could reduce the probability of T. pallidum infection in pregnant women and their infants.

Temporal Trend of Gestational Syphilis between 2008 and 2018 in Brazil: Association with Socioeconomic and Health Care Factors

The increased number of cases in recent years has turned syphilis into a global public health problem. In 2020, 115,371 cases of acquired syphilis were reported (detection rate of 54.5 cases/100,000 inhabitants) in Brazil. In that same period, the country notified 61,441 cases of gestational syphilis (detection rate of 21.6 per 1000 live births). The number of syphilis cases points to the need to reinforce surveillance, prevention, and infection control actions, which is a worrying scenario for government organizations. This study aims to describe the temporal trend of gestational syphilis from 2008 to 2018 in Brazilian regions and to associate its detection rate with socioeconomic and health care indicators. We conducted an ecological study of temporal trends using secondary data from the Department of Informatics of the Unified Health System. The temporal trend was analyzed using the Joinpoint Regression program. The annual percent change (APC) and 95% confidence intervals (95%CI) were estimated and tested; statistical significance was assessed using the Monte Carlo permutation test. Correlations were assessed using Pearson's correlation coefficient, and statistical significance was calculated using Pearson's product-moment correlation. The gestational syphilis detection rate increased between 2008 and 2018. The South region showed the greatest trend, whereas the Midwest region presented the lowest trend. The following variables were significantly correlated with the gestational syphilis detection rate: Municipal Human Development Index, illiteracy rate, percentage of primary health care coverage, and proportion of doctors, nurses, and basic health units per inhabitant. Health policies are needed to mitigate social vulnerabilities and strengthen primary health care.

Exploring changes in maternal and congenital syphilis epidemiology to identify factors contributing to increases in congenital syphilis in Florida: a two time-period observational study (2013-2014 vs 2018-2019)

OBJECTIVES

As, cases of congenital syphilis (CS) and infectious syphilis among women more than doubled in Florida and across the nation during 2013-2019, we sought to understand what may be contributing to these increases in Florida.

DESIGN

A two time-period observational study.

SETTING

Pregnant women with reported syphilis infections and their pregnancy outcomes (2013-2014 and 2018-2019) in Florida.

PARTICIPANTS

1213 pregnant women with reported syphilis infections living in Florida and 341 infants meeting the CS case definition.

OUTCOME MEASURES

We assessed what proportion of the increase in CS was from increases in maternal syphilis infections. We examined maternal demographics, infection characteristics and timing of diagnoses that could explain the increase in CS. Finally, we reviewed if changes in presentation or severity of CS cases occurred.

RESULTS

During 2013-2014, 83 (21%) of 404 pregnant women with syphilis delivered babies with CS. During 2018-2019, 258 (32%) of 809 pregnant women with syphilis delivered babies with CS. Comparing CS prevention rates, it was determined that 65% of the increase in CS was due to the increases in maternal syphilis infections. The proportion of maternal cases staged as primary or secondary increased over time (7%-13%) (p<0.01) and reports of drug use became slightly more common (6%-10%) (p=0.02). During 2018-2019, women delivering CS infants were more likely to be reinfected during the same pregnancy (27 (10%) vs 5 (6%) p=0.23) and more had negative third trimester screening tests (43 (17%) vs 7 (8% p=0.07)). The percentage of infants with CS who had ≥1 sign or symptom increased from 35% to 40%, and the combined total of stillbirths and infant deaths increased from 5 to 26.

CONCLUSIONS

Recently, more pregnant women are being infected with syphilis and a higher per cent are not being treated to prevent CS. The reasons for this finding are unclear.

Clinical Protocols and Treatment Guidelines for the Management of Maternal and Congenital Syphilis in Brazil and Portugal: Analysis and Comparisons: A Narrative Review

(1) Background: Maternal syphilis (MS) and congenital syphilis (CS) are serious public health problems worldwide due to their high morbidity and mortality rates. (2) Objective: Evaluating the applicability of Clinical Protocols and Treatment Guidelines on case incidence trends in Brazil and Portugal. (3) Methods: The review was done through bibliographic research in two public databases and government websites from both countries, published between 2007 and 2022. All guidelines that contained CS and MS were selected. (4) Results and discussion: After evaluation, we found that Brazil and Portugal have adequate protocols for screening and treating congenital and maternal syphilis. (5) Conclusion: The results suggest that CS and MS incidence are notably higher in Brazil than in Portugal due to economic, cultural, and social disparities and the differences in territory size. Therefore, these demographic and socioeconomic factors could strongly influence efforts to fight against syphilis and thus control the infection.

Examination of Care Milestones for Preventing Congenital Syphilis Transmission Among Syphilis-Infected Pregnant Women in Alberta, Canada: 2017-2019

BACKGROUND

An infectious syphilis outbreak in Alberta has resulted in increased congenital syphilis (CS) cases. To shed light on potential risk factors, we used administrative data sets to examine care milestones for the prevention of CS among pregnant women diagnosed with syphilis, as well as correlates of women giving birth to infants with CS.

METHODS

Provincial administrative databases were used to identify and describe pregnant women diagnosed with any stage of infectious or noninfectious syphilis who gave birth in Alberta between January 1, 2017, and December 31, 2019. Data on prenatal care, syphilis screening, and syphilis medication dispensation were used to evaluate the care milestones. Clinical care and maternal demographics were assessed using logistic and linear regression analyses to determine correlates for missed care milestones or a newborn outcome of CS.

RESULTS

Of 182 syphilis-infected pregnant women, 63 (34.6%) delivered a newborn with CS. Overall, in the first trimester, 136 (75.1%) women had a health care visit, 72 (39.6%) had a prenatal care visit, 71 (39.0%) were screened for syphilis, and 44 (24.2%) were treated. Gestational time to treatment initiation (adjusted odds ratio, 1.04; 95% confidence interval, 1.02-1.06) and older maternal age at diagnosis (adjusted odds ratio: 1.28, 95% confidence interval, 1.08-1.50) were independently associated with CS outcomes. No variables were found to be independently associated with a health care visit, prenatal screening, or initiation of treatment.

CONCLUSIONS

Although nearly two-thirds of CS cases were prevented, there remained missed opportunities in the prevention of CS. Early treatment, which relies on timely access to prenatal care and screening, was the most important for the prevention of CS.

Disparities in state-mandated third-trimester testing for syphilis

BACKGROUND

Since 1999, Illinois has had a legal statute mandating both first-visit and third-trimester syphilis testing in all pregnancies. However, the incidence of syphilis infection is increasing at the national and state level, including among individuals of reproductive age, conferring risk of congenital syphilis. Although state-mandated infectious disease screening is purported to be a strategy to improve equity and quality of care, adherence to such mandates and disparities in adherence are unknown.

OBJECTIVE

We sought to evaluate compliance with state-mandated third-trimester syphilis testing at a single tertiary hospital in Illinois and to identify disparities in testing.

STUDY DESIGN

This is a retrospective cohort study of all pregnant individuals who delivered between January 1, 2015 and February 28, 2018 at a large-volume academic center. Patients who delivered after 28 weeks of gestation were included. Frequency of state-mandated first-visit (<28 weeks) and third-trimester (≥28 weeks) syphilis screening was evaluated over the study period. The primary outcome was completion of any third-trimester screening (ie, performed as an initial or repeat test in the third trimester) in accordance with state law. Demographic and clinical factors associated with the primary outcome and with completion of both first-visit and third-trimester screening were evaluated with multivariable logistic regression.

RESULTS

Of the 9048 eligible deliveries, 96.9% (N=8766) of patients had first-visit syphilis screening, whereas only 27.3% (N=2469) had third-trimester screening. Performance of third-trimester syphilis testing increased over time from an average of 5.8% of deliveries during the first 6 months of the study period to 59.8% over the last 6 months of the study period. Non-Hispanic Black or Hispanic race or ethnicity, non-English primary language, public insurance, age <25, multiparity, and greater body mass index were independently associated with increased odds of third-trimester screening.

CONCLUSION

Despite a decades-old state mandate for third-trimester syphilis screening in this high-prevalence region, third-trimester screening performance was suboptimal. Several demographic characteristics were associated with adherence to screening, suggesting inequity and bias exist in testing practices. It is important to acknowledge that legal statutes do not fully eliminate bias and health disparities.

The Text Mining Technique Applied to the Analysis of Health Interventions to Combat Congenital Syphilis in Brazil: The Case of the "Syphilis No!" Project

Congenital syphilis (CS) remains a threat to public health worldwide, especially in developing countries. To mitigate the impacts of the CS epidemic, the Brazilian government has developed a national intervention project called "Syphilis No." Thus, among its range of actions is the production of thousands of writings featuring the experiences of research and intervention supporters (RIS) of the project, called field researchers. In addition, this large volume of base data was subjected to analysis through data mining, which may contribute to better strategies for combating syphilis. Natural language processing is a form of knowledge extraction. First, the database extracted from the "LUES Platform" with 4,874 documents between 2018 and 2020 was employed. This was followed by text preprocessing, selecting texts referring to the field researchers' reports for analysis. Finally, for analyzing the documents, N-grams extraction (N = 2,3,4) was performed. The combination of the TF-IDF metric with the BoW algorithm was applied to assess terms' importance and frequency and text clustering. In total, 1019 field activity reports were mined. Word extraction from the text mining method set out the following guiding axioms from the bigrams: "confronting syphilis in primary health care;" "investigation committee for congenital syphilis in the territory;" "municipal plan for monitoring and investigating syphilis cases through health surveillance;" "women's healthcare networks for syphilis in pregnant;" "diagnosis and treatment with a focus on rapid testing." Text mining may serve public health research subjects when used in parallel with the conventional content analysis method. The computational method extracted intervention activities from field researchers, also providing inferences on how the strategies of the "Syphilis No" Project influenced the decrease in congenital syphilis cases in the territory.

Identification of United States Counties at Elevated Risk for Congenital Syphilis Using Predictive Modeling and a Risk Scoring System, 2018

BACKGROUND

The persistence of congenital syphilis (CS) remains an important concern in the United States. We use the 2018 data to refine a previous predictive model that identifies US counties at elevated risk for CS in 2018.

METHODS

Using county-level socioeconomic and health-related data from various sources, we developed a logistic regression predictive model to identify county-level factors associated with a county having had 1 or more CS case reported to the National Notifiable Diseases Surveillance System in 2018. We developed a risk scoring algorithm, identified the optimal risk score cutpoint to identify counties at elevated risk, and calculated the live birth to CS case ratio for counties by predicted risk level to compare counties at elevated risk with counties not at elevated risk.

RESULTS

We identified several county-level factors associated with a county having 1 or more CS case in 2018 (area under the curve, 88.6%; Bayesian information criterion, 1551.1). Using a risk score cutoff of 8 or higher (sensitivity, 83.2%; specificity, 79.4%), this model captured 94.7% (n = 1,253) of CS cases born in 2018 and identified 850 (27%) counties as being at elevated risk for CS. The live birth to CS case ratio was lower in counties identified as at elevated risk (2,482) compared with counties categorized as not at elevated risk (10,621).

CONCLUSIONS

Identifying which counties are at highest risk for CS can help target prevention efforts and interventions. The relatively low live birth to CS case ratio in elevated risk counties suggests that implementing routine 28-week screening among pregnant women in these counties may be an efficient way to target CS prevention efforts.

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.

A qualitative assessment of structural barriers to prenatal care and congenital syphilis prevention in Kern County, California

Congenital syphilis is the result of placental transmission from mother to fetus of Treponema pallidum. Although congenital syphilis is preventable through timely treatment, the rate of new infections in the United States (US) has increased each year since 2013, and is increasing at a noticeably greater pace in California (CA). Most research into congenital syphilis has focused on individual psychosocial and behavioral factors that contribute to maternal vulnerability for syphilis. The aim of this study was to evaluate structural barriers to prenatal care access and utilization and congenital syphilis prevention in Kern County, CA. Transcripts from 8 in-depth interviews with prenatal care providers and 5 focus group discussions with 42 pregnant and postpartum persons were examined using thematic analysis. Structural barriers experienced by pregnant and postpartum persons to prenatal care access and utilization included (1) burdens of poverty; (2) stigma around substance use in pregnancy; (3) citizenship status; (4) lack of healthcare coverage; (5) low sexual health literacy; and (6) gender inequality Structural barriers experienced by prenatal care providers in congenital syphilis prevention included (1) limited guidance on clinical management of syphilis in pregnancy; (2) decay in public health infrastructure; and (3) inadequate support for managing patients' social comorbidities. The response to congenital syphilis prevention will require an examination of the complex context of social determinants of health in which persons diagnosed with syphilis live in.

Clinical presentation of congenital syphilis in a rotavirus vaccine cohort study in Lusaka: a case series

BACKGROUND

Despite an otherwise robust national antenatal clinic program, maternal and congenital syphilis remains an important public health issue in Zambia. This case series reports the clinical presentation of seven infants diagnosed with congenital syphilis in Lusaka, Zambia.

CASE PRESENTATIONS

The cases in this series were incidental findings from a cohort of infants enrolled in a rotavirus vaccine immunogenicity study recruiting infants at 6 weeks of age. As part of clinical care for enrolled participants, we screened mothers of children who presented with adverse events of (i) repeated upper respiratory tract infections/coryza, (ii) skin lesions, and (iii) poor weight gain, for syphilis using rapid plasma reagin test. From a cohort of 214 mother-infant pairs enrolled between September and December 2018, a total of 115 (44.4%) of the mothers reported to have not been screened during antenatal care. Of these, four (3.5%) reported to have tested positive; and only two received treatment. Seven out of 57 (26.6%) children meeting the screening criteria had a positive rapid plasma reagin test result. The mean age at diagnosis was 4.5 months (1.3 months standard deviation), and the common presenting features included coryza (6/7), skin lesions (4/7), conjunctivitis (3/7), pallor/anemia (5/7), wasting (2/7), and underweight (5/7). Three of the seven infants were exposed to human immunodeficiency virus. Following diagnosis, all seven cases received standard treatment according to national treatment guidelines. That is, 6/7 cases received inpatient care with benzylpenicillin for 10 days, while 1/7 was treated as an outpatient and received daily procaine penicillin for 10 days.

CONCLUSION

These findings suggest that, though screening for syphilis is part of the standard antenatal care in Zambia, it is not offered optimally. There is urgent need to address programmatic shortcomings in syphilis screening and treatment to avoid long-term sequelae. Additionally, clinicians need to raise their index of suspicion and rule out syphilis when confronted with these clinical symptoms, regardless of the mother's human immunodeficiency virus status.

Syphilis: Far from Ancient History

Rates of primary, secondary, and congenital syphilis are increasing in the United States, and reversing this trend requires renewed vigilance on the part of family physicians to assist public health agencies in the early detection of outbreaks. Prompt diagnosis of syphilis can be challenging, and not all infected patients have common manifestations, such as a genital chancre or exanthem. The U.S. Preventive Services Task Force recommends screening for syphilis in all patients at increased risk, particularly those who reside in high-prevalence areas, sexually active people with HIV infection, and men who have sex with men. Other groups at increased risk include males 29 years or younger and people with a history of incarceration or sex work. All pregnant women should be screened for syphilis at the first prenatal visit, and those at increased risk should be screened throughout the pregnancy. The Centers for Disease Control and Prevention recommends the traditional screening algorithm for most U.S. populations. Penicillin is the preferred treatment across all stages of syphilis, although limited research suggests a possible role for other antibiotics in penicillin-allergic patients with primary or secondary syphilis. Pregnant women with syphilis who are allergic to penicillin should undergo penicillin desensitization before treatment.

Global burden of maternal and congenital syphilis and associated adverse birth outcomes-Estimates for 2016 and progress since 2012

BACKGROUND

In 2007 the World Health Organization (WHO) launched the global initiative to eliminate mother-to-child transmission of syphilis (congenital syphilis, or CS). To assess progress towards the goal of <50 CS cases per 100,000 live births, we generated regional and global estimates of maternal and congenital syphilis for 2016 and updated the 2012 estimates.

METHODS

Maternal syphilis estimates were generated using the Spectrum-STI model, fitted to sentinel surveys and routine testing of pregnant women during antenatal care (ANC) and other representative population data. Global and regional estimates of CS used the same approach as previous WHO estimates.

RESULTS

The estimated global maternal syphilis prevalence in 2016 was 0.69% (95% confidence interval: 0.57-0.81%) resulting in a global CS rate of 473 (385-561) per 100,000 live births and 661,000 (538,000-784,000) total CS cases, including 355,000 (290,000-419,000) adverse birth outcomes (ABO) and 306,000 (249,000-363,000) non-clinical CS cases (infants without clinical signs born to un-treated mothers). The ABOs included 143,000 early fetal deaths and stillbirths, 61,000 neonatal deaths, 41,000 preterm or low-birth weight births, and 109,000 infants with clinical CS. Of these ABOs- 203,000 (57%) occurred in pregnant women attending ANC but not screened for syphilis; 74,000 (21%) in mothers not enrolled in ANC, 55,000 (16%) in mothers screened but not treated, and 23,000 (6%) in mothers enrolled, screened and treated. The revised 2012 estimates were 0.70% (95% CI: 0.63-0.77%) maternal prevalence, and 748,000 CS cases (539 per 100,000 live births) including 397,000 (361,000-432,000) ABOs. The estimated decrease in CS case rates between 2012 and 2016 reflected increased access to ANC and to syphilis screening and treatment.

CONCLUSIONS

Congenital syphilis decreased worldwide between 2012 and 2016, although maternal prevalence was stable. Achieving global CS elimination, however, will require improving access to early syphilis screening and treatment in ANC, clinically monitoring all women diagnosed with syphilis and their infants, improving partner management, and reducing syphilis prevalence in the general population by expanding testing, treatment and partner referral beyond ANC.

Screening for Syphilis Infection in Pregnant Women: US Preventive Services Task Force Reaffirmation Recommendation Statement

IMPORTANCE

Untreated syphilis infection in pregnant women can be transmitted to the fetus (congenital syphilis) at any time during pregnancy or at birth. Congenital syphilis is associated with stillbirth, neonatal death, and significant morbidity in infants (eg, bone deformities and neurologic impairment). After a steady decline from 2008 to 2012, cases of congenital syphilis markedly increased from 2012 to 2106, from 8.4 to 15.7 cases per 100 000 live births (an increase of 87%). At the same time, national rates of syphilis increased among women of reproductive age.

OBJECTIVE

To update the US Preventive Services Task Force (USPSTF) 2009 recommendation on screening for syphilis infection in pregnant women.

EVIDENCE REVIEW

The USPSTF commissioned a reaffirmation evidence update to identify new and substantial evidence sufficient enough to change its prior recommendation. Given the established benefits and practice of screening for syphilis in pregnant women, the USPSTF targeted its evidence review on the direct benefits of screening on the prevention of congenital syphilis morbidity and mortality and the harms of screening for and treatment of syphilis infection in pregnant women.

FINDINGS

Using a reaffirmation process, the USPSTF found that accurate screening algorithms are available to identify syphilis infection. Effective treatment with antibiotics can prevent congenital syphilis and significantly decrease adverse pregnancy outcomes, with small associated harms, providing an overall substantial health benefit. Therefore, the USPSTF reaffirms its previous conclusion that there is convincing evidence that screening for syphilis infection in pregnant women provides substantial benefit.

CONCLUSIONS AND RECOMMENDATION

The USPSTF recommends early screening for syphilis infection in all pregnant women. (A recommendation).

Screening for Syphilis Infection in Pregnant Women: Updated Evidence Report and Systematic Review for the US Preventive Services Task Force

IMPORTANCE

The incidence of syphilis and congenital syphilis in the United States has increased after reaching historic lows in the early 2000s.

OBJECTIVE

To systematically review literature on the effectiveness and harms of screening for syphilis in pregnancy and the harms of penicillin treatment in pregnancy to inform the US Preventive Services Task Force.

DATA SOURCES

MEDLINE, PubMed, and the Cochrane Central Register of Controlled Trials for relevant English-language literature, published from January 1, 2008, to June 2, 2017. Ongoing surveillance was conducted through November 22, 2017.

STUDY SELECTION

Studies conducted in countries categorized as "high" or "very high" on the Human Development Index that explicitly addressed 1 of 3 a priori-defined key questions.

DATA EXTRACTION AND SYNTHESIS

Independent critical appraisal and data abstraction by 2 reviewers. Data from included studies were narratively synthesized without pooling data.

MAIN OUTCOMES AND MEASURES

Incidence of congenital syphilis; any harms of screening or penicillin treatment in pregnancy.

RESULTS

Seven studies in 8 publications were included. One observational study evaluated the implementation of syphilis screening in pregnancy in 2 441 237 women in China. From 2002 to 2012, screening for syphilis in all pregnant women increased from 89.8% to 97.2%, and the incidence of congenital syphilis decreased from 109.3 to 9.4 cases per 100 000 live births. Five studies (n = 21 795) evaluated the false-positive findings of treponemal tests and 1 study (n = 318) evaluated the false-negative findings of nontreponemal tests. These studies found that false-positives with treponemal-specific enzyme or chemiluminescent immunoassays were common (46.5%-88.2%), therefore warranting reflexive (automatic confirmatory) testing for all positive test findings. One study (n = 318) found no false-negatives with treponemal tests, and 1 study (n = 139) demonstrated the prozone phenomenon (false-negative response from high antibody titer) with rapid plasma reagin screening using undiluted samples (2.9%). No studies were identified for harms of penicillin in pregnancy.

CONCLUSIONS AND RELEVANCE

Screening for syphilis infection in pregnant women is associated with reduced incidence of congenital syphilis, and available evidence supports the need for reflexive testing for positive test results.