Syphilis Screening in Pregnancy: A complex diagnostic landscape

Syphilis Screening in Pregnancy: Are Current Rapid Tests Missing the Mark?

"A new study reveals the limitations of dual screening tests in detecting active syphilis in pregnant women, especially in regions where non-venereal treponematoses are common."


Syphilis screening during antenatal care (ANC) is a crucial strategy for preventing congenital syphilis, a serious condition that can occur when an infected mother transmits the disease to her unborn child. The World Health Organization (WHO) has recommended syphilis screening during ANC since 2006, emphasizing its role in enabling infected mothers to receive timely treatment and prevent transmission.

In resource-limited settings, rapid diagnostic tests (RDTs) are commonly used for syphilis screening due to their simplicity and ability to provide same-day results, facilitating prompt treatment. However, most syphilis RDTs detect only treponemal antibodies, which can lead to overtreatment in women who have been previously treated for syphilis or have non-venereal treponematoses, a group of related infections that elicit a similar antibody response. This is particularly problematic in regions where both venereal and non-venereal treponematoses are endemic.

A study conducted in Burkina Faso evaluated the effectiveness of a newer rapid test, the Dual Path Platform (DPP) Screen and Confirm Assay, which detects both treponemal and non-treponemal antibodies, in reducing overtreatment compared to traditional treponemal RDTs. The findings revealed that the DPP assay did not reduce overtreatment and, surprisingly, had a higher rate of underdiagnosis, raising concerns about its suitability in this specific context.

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Why Screening Matters

Syphilis screening during pregnancy is intended to identify infection early enough for appropriate clinical management. The available material for this subsection does not provide current statistics, prevalence estimates, or outcome figures. Any assessment of the scale of missed infections therefore requires up-to-date epidemiologic and clinical sources.

Current Testing Limits

Pregnancy screening generally relies on established clinical testing pathways and follow-up interpretation. No sources were provided here to identify specific tests, accepted protocols, or quantified limitations. Claims about the accuracy or shortcomings of rapid tests should therefore be verified against dedicated clinical evidence.

A Developing Field

The historical development of syphilis screening cannot be summarized reliably from the material supplied for this subsection. No milestones, foundational discoveries, or dates were provided. A meaningful historical account would require sources documenting the evolution of diagnostic methods and prenatal screening policy.

The Challenge of Syphilis Diagnosis in Endemic Regions

Syphilis Screening in Pregnancy: A complex diagnostic landscape

The study, conducted in Déou, Burkina Faso, involved 242 pregnant women attending antenatal care. Researchers compared the performance of the DPP assay to a traditional treponemal RDT (SD Bioline) and reference laboratory tests, including Treponema pallidum passive particle agglutination (TPPA) and quantitative rapid plasma reagin (RPR).

The results indicated that 37.6% of the women had presumptive active syphilis, defined as a reactive TPPA and RPR result. Notably, 19.0% had high RPR titres (≥8), suggesting a significant proportion of active infections. The DPP assay did not reduce the number of women who would have been overtreated compared to the traditional T-RDT (0.0% vs 2.5%; p=0.218) and resulted in a higher proportion of underdiagnosis (48.4% vs 2.2%; p<0.001).

  • Overtreatment Concerns: Traditional syphilis RDTs often detect antibodies from past infections, leading to unnecessary treatment.
  • DPP Assay Performance: The Dual Path Platform assay, designed to improve accuracy, did not reduce overtreatment in the study.
  • Underdiagnosis Risk: The DPP assay showed a higher rate of underdiagnosis compared to traditional tests, potentially leaving active infections untreated.
  • Regional Factors: High seroprevalence in the area suggests the presence of non-venereal treponemal infections, complicating accurate diagnosis.
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No Relevant Research Identified

The listed results are TikTok profile pages for studybookemma accounts, whose snippets describe biology-related creators but do not identify research studies, reviews, rapid tests, syphilis, or pregnancy screening. They therefore provide no support for conclusions about the latest research in this field. The material is insufficient to establish current evidence or research gaps.

Evidence Mismatch

The listed sources concern why the sky appears blue, how atmospheric particles scatter light, and the color of skies on Mars. The Center for Science Education, NASA, and NOAA descriptions agree that shorter blue wavelengths are scattered efficiently by air molecules, while dust or aerosols can alter observed colors. These sources do not address syphilis screening, pregnancy, rapid tests, or clinical failures, so they cannot support arguments about this article's topic.

An Unrelated Comparison

The supplied sources compare or document New York Yankees and Kansas City Royals baseball games rather than diagnostic methods. One listing reports a Yankees road victory over the Royals, 4-3, on May 25, 2026, while another reports a 7-0 Yankees win on May 27. These sports results cannot support a comparison of syphilis screening tests or their performance in pregnancy.

The study highlights the complexities of syphilis screening in regions where non-venereal treponematoses are prevalent. The high seroprevalence in the study population may indicate the presence of other treponemal infections, such as bejel or yaws, which can lead to false-positive results with traditional syphilis tests. This underscores the need for accurate and context-specific diagnostic strategies to ensure appropriate treatment and prevent overtreatment.

Rethinking Syphilis Screening Strategies

The findings suggest that a nuanced approach to syphilis screening is necessary, taking into account the local epidemiology and the potential for non-venereal treponematoses. Further research is needed to determine the optimal screening strategies in different contexts, considering the trade-offs between overtreatment and underdiagnosis. Additionally, efforts to control non-venereal treponematoses through mass treatment with azithromycin may help reduce the burden of these infections and improve the accuracy of syphilis screening in pregnant women.

AI Search Multiple angles on this topic

No Clinical Commentary Available

The listed sources describe skills, origins, and gameplay strategies in MADNESS: Project Nexus. They do not contain expert commentary about syphilis, pregnancy, screening, or diagnostic accuracy. No clinically grounded synthesis can be drawn from this material.

No Relevant Forecasting Evidence

The supplied sources concern the 1996 film Trainspotting, its source novel, and reviews or listings for the film. They do not discuss future diagnostic technologies, prenatal screening, or syphilis testing. Consequently, they provide no evidence for a future outlook or next frontiers in this health topic.

Context Requires Better Sources

Broader systemic challenges in prenatal syphilis screening may involve clinical, public-health, and access considerations, but no sources were provided for this subsection. The available material therefore does not support specific claims about disparities, implementation barriers, or health-system performance. Those issues should be addressed using relevant public-health and clinical evidence.

No Health Impact Evidence

The supplied sources describe the .to country-code top-level domain and Microsoft To Do, including URL uses and task organization features. Neither source addresses patients, pregnancy, syphilis, screening experiences, or health outcomes. They therefore cannot substantiate claims about the human or real-world impact of missed diagnoses.

How the DPP results compare with the existing rapid test

  • 44/91 vs 2/91 womenAmong women classified as having presumptive active syphilis, 44 of 91 would have been left untreated with DPP, compared with 2 of 91 using the treponemal rapid test; the study reported this difference as statistically significant.[1]Caveat: p<0.001
  • €2–3 per testDPP testing cost €2–3 per test in the study; the authors said its value for patient care should be assessed in other settings and populations.[2]

Where the Burkina Faso result is weakest

  • Antibody tests cannot separate venereal from non-venereal treponemal infections, so a positive pattern does not identify which infection caused it.[1]
  • Clinicians had more difficulty reading weak positive results on the non-treponemal line than on the treponemal line.[2]

The Déou antenatal-care field evaluation at a glance

PopulationPregnant women screened for syphilis during antenatal care in Déou, Burkina Faso[2]
Sample size242[2]
SettingAntenatal care in Déou, Burkina Faso[2]
ComparisonDPP Screen and Confirm Assay compared with T-RDT (SD Bioline)[2]
Main outcomePotential reduction in overtreatment when comparing DPP with T-RDT[2]
Effect sizeOvertreatment: 0.0% with DPP vs 2.5% with T-RDT; underdiagnosis: 48.4% vs 2.2%[2]
Times cited14[2]

How this field result fits the wider testing evidence

Later reviews cited the Burkina Faso findings as an example of substantial underdiagnosis with a combined treponemal/non-treponemal approach, including in broader discussions of field evaluations.[3]

Questions left open by the DPP evaluation

  • Would DPP performance differ in populations where non-venereal treponemal infections are less common?[1] [2]
  • Would results change when clinicians, rather than a laboratory technician, read the non-treponemal line, given the weaker agreement on that line?[2]
  • How would DPP compare with treponemal-only testing for patient care and prevention of congenital transmission in other settings, given its price and the authors’ call for reassessment?[2]

Terms used in the test comparison

DPP assay
A rapid test that detects treponemal and non-treponemal antibodies and gives a result from capillary blood.[1]
Non-venereal treponematoses
Related treponemal infections, such as bejel or yaws, that can produce an immune response indistinguishable from venereal syphilis in serological tests.[1]

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1136/sextrans-2018-053722, Alternate LINK

Title: Dual Screen And Confirm Rapid Test Does Not Reduce Overtreatment Of Syphilis In Pregnant Women Living In A Non-Venereal Treponematoses Endemic Region: A Field Evaluation Among Antenatal Care Attendees In Burkina Faso

Subject: Infectious Diseases

Journal: Sexually Transmitted Infections

Publisher: BMJ

Authors: Céline Langendorf, Céline Lastrucci, Isabelle Sanou-Bicaba, Kara Blackburn, Marie-Hortense Koudika, Tania Crucitti

Published: 2018-12-22

Everything You Need To Know

1

Why is syphilis screening during antenatal care (ANC) so important?

Syphilis screening during antenatal care (ANC) is crucial to prevent congenital syphilis. This serious condition occurs when an infected mother transmits the disease to her unborn child. Timely screening allows for the infected mothers to receive treatment and prevent the transmission of the disease to the baby, safeguarding the health of both mother and child.

2

What are the limitations of using rapid diagnostic tests (RDTs) for syphilis screening, especially in resource-limited settings?

While rapid diagnostic tests (RDTs) are convenient for syphilis screening in resource-limited settings due to their simplicity and rapid results, most detect only treponemal antibodies. This can lead to overtreatment in women who have been previously treated for syphilis or have non-venereal treponematoses. The latter elicit a similar antibody response, complicating accurate diagnosis, especially in regions where both venereal and non-venereal treponematoses are endemic.

3

How did the Dual Path Platform (DPP) Screen and Confirm Assay perform compared to traditional treponemal RDTs in the study conducted in Burkina Faso?

The study in Burkina Faso compared the Dual Path Platform (DPP) Screen and Confirm Assay with a traditional treponemal RDT (SD Bioline). Surprisingly, the DPP assay did not reduce overtreatment compared to the traditional T-RDT. The DPP assay also showed a higher rate of underdiagnosis. This indicates that the newer test did not improve accuracy in this specific context and raised concerns about its suitability.

4

What are the implications of non-venereal treponematoses on the accuracy of syphilis screening?

Non-venereal treponematoses, such as bejel or yaws, can lead to false-positive results with traditional syphilis tests because they elicit a similar antibody response. In regions where these infections are prevalent, the high seroprevalence complicates accurate diagnosis. This underscores the need for context-specific diagnostic strategies to ensure appropriate treatment and prevent both overtreatment and underdiagnosis.

5

What alternative strategies are suggested to improve syphilis screening and treatment in pregnant women?

The findings suggest a nuanced approach to syphilis screening. This means taking into account the local epidemiology and the potential for non-venereal treponematoses. Further research is needed to determine optimal screening strategies in different contexts. In addition, controlling non-venereal treponematoses through mass treatment with azithromycin may help improve the accuracy of syphilis screening in pregnant women, reducing the burden of these infections, and improving treatment outcomes.

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