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Open research questions in Syphilis Diagnosis and Treatment

135 gap statements mined from Syphilis Diagnosis and Treatment papers in our 4.5M-paper local library, which holds 815 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Stigma and unstable housing were identified as challenges in engaging patients in care. Difficulties in engaging some patients despite repeated outreach were also reported. The study highlights the need for ongoing efforts to address these challenges and improve care coordination.

    Healthcare Professionals’ Perspectives on the Direct Referral Pathway for Syphilis Management in Western Sydney · 2026 · DOI

  • The review also notes the challenge of a lack of awareness about the risks of STI and the need for a general change in lifestyle.

    New Trends in Sexually Transmitted Infections Among Adolescents and Young People: Epidemiology, Clinical and Diagnostic Management · 2025 · DOI

  • There is a lack of awareness about the risks of STI among adolescents and young adults. The current healthcare models may not be effective in addressing the rising STI rates. There is a need for innovative multidisciplinary healthcare models to address the STI issue.

    New Trends in Sexually Transmitted Infections Among Adolescents and Young People: Epidemiology, Clinical and Diagnostic Management · 2025 · DOI

  • There is a need for enhanced interventions to prevent sexually transmitted infections. The paper identifies a gap in the understanding of malignant syphilis in HIV-positive patients. The paper highlights the importance of considering syphilis in the differential diagnosis of lymphadenopathy in HIV-positive patients.

    Malignant Syphilis Mimicking Lymphoma in HIV: A Challenging Case and a Review of Literature Focusing on the Role of HIV and Syphilis Coinfection · 2025 · DOI

  • While the occurrences of Haemophilus ducreyi (HD) in yaws-like lesions has been widely documented, there is limited evidence regarding its influence on treatment outcomes assessed at the WHO-recommended 4-week follow-up.

    Assessment of the role of Haemophilus ducreyi coinfection on outcomes of Yaws treatment in the southwestern part of Ghana · 2026 · DOI

  • The WHO recommends benzathine penicillin G (BPG) as the standard treatment in pregnant women, whilst the optimal dosing strategy has not been established, particularly in relation to the impact of gestational age.

    Pharmacokinetics of a three-dose regimen of intramuscular benzathine penicillin G in pregnant women with syphilis · 2026 · DOI

  • Progress remains limited by our reliance on indirect diagnostic methods, the need for agents to achieve adequate concentrations in the central nervous system, and for drugs to be suitable for use in pregnancy and infants.

    Key Considerations in Evaluating Syphilis Therapeutics · 2026 · DOI

  • The NTT band without quantitation is insufficient for treatment monitoring or infant diagnosis.

    The Potential for Combined Treponemal/Nontreponemal Rapid Point-of-Care Test and Treponema pallidum Polymerase Chain Reaction in the Diagnosis of Gestational and Congenital Syphilis in a Low-Resource, High-Prevalence Setting: Pilot Data From Malawi · 2026 · DOI

  • While recent national increases in unknown duration or late syphilis (UDLS) have outpaced diagnoses of earlier stages of syphilis, the causes and contributors remain unknown.

    Unknown Duration or Late Syphilis Cases with High Titers—North Carolina, 2015 and 2023 · 2026 · DOI

  • The results from our study are consistent with current limited knowledge and suggest that oral cefixime can be an effective and safe therapy for the treatment of early syphilis.

    Cefixime versus benzathine penicillin G for the treatment of early syphilis—a randomized, controlled open label trial · 2025 · DOI

  • Further studies evaluating this point-of-care antitreponemal IgM test as a neonatal diagnostic test for congenital syphilis are warranted.

    A Novel Point-of-Care Rapid IgM Test for the Diagnosis of Congenital Syphilis · 2025 · DOI

  • The incidence of syphilis has been rising globally, but effective screening strategies are lacking.

    Utility of Preoperative Syphilis Screening on the Detection of Syphilis at a Tertiary Care Center: A Retrospective Cohort Study · 2025 · DOI

  • Guidelines for treating neonates exposed to perinatal syphilis are clear when treating neonates for confirmed proven or highly probable syphilis, but guidelines remain unclear when treating neonates deemed less likely to have congenital syphilis.

    Relationship Between Neonatal Nontreponemal Titers and Congenital Syphilis Treatment Patterns in Neonates Born to People With Adequately Treated Syphilis During Pregnancy · 2025 · DOI

  • Prevalence data of STIs to inform strategies toward this goal are lacking in middle- and low-income countries, especially among men.

    Prevalence of Syphilis Among Men Serving in the Militaries of Sub-Saharan Africa · 2024 · DOI

  • Additional research is needed to better understand mechanisms driving associations between childhood sexual abuse and syphilis incidence as well as to develop interventions improve testing and treatment among Black YSGM, YSGM who experience childhood sexual abuse, and YSGM who experience alcohol problems.

    Childhood Sexual Abuse, Alcohol Problem Scores, and Race Are Associated With Syphilis Incidence in a Prospective Cohort of Young Sexual and Gender Minority Adults Assigned Male at Birth · 2024 · DOI

  • Partner services (PS) have been integral to syphilis control in the United States since the early 20th century but have not been evaluated in a controlled study.

    An Evaluation of Syphilis Partner Services Among Gay, Bisexual, and Other Men Who Have Sex With Men With Early Syphilis in King County, WA · 2024 · DOI

  • The gap is that syphilis exposure can occur through non-penetrative sexual contact when infectious lesions are present. There is a need to consider syphilis in patients with unexplained hair loss, even when penetrative intercourse is denied.

    Case Report: Secondary syphilitic alopecia following non-penetrative sexual contact: a case of initial misdiagnosis · 2026 · DOI

  • These findings establish a foundation for CSF cytokine-guided risk stratification in syphilis patients, although prospective validation in larger, age-matched cohorts is warranted to optimize clinical cut-offs and confirm generalizability across diverse populations.

    Cytokines in cerebrospinal fluid combined with machine learning improve the diagnostic accuracy and predict the progression of neurosyphilis · 2026 · DOI

  • The need for cerebrospinal fluid analysis can delay diagnosis. The disease can present with atypical symptoms, making diagnosis more difficult.

    Neurosyphilis presenting with cortical ribboning and periodic EEG discharges: a diagnostic challenge · 2026 · DOI

  • Limited access to screening services can reduce pregnant women's participation in prenatal care and infectious disease screening, including syphilis. Distance and lack of transportation can act as structural barriers to successful screening. Stigma can reduce the effectiveness and sustainability of syphilis screening programs.

    Analysis of accessibility factors and community support for the success of the syphilis screening program for pregnant women · 2026 · DOI

  • The study highlights the need to examine the role of service accessibility and community support in successful screening.

    Analysis of accessibility factors and community support for the success of the syphilis screening program for pregnant women · 2026 · DOI

  • Syphilis epidemics among women and men who have sex with men (MSM) may be connected, but these connections are poorly understood.

    Syphilis Positivity Among Men Who Have Sex With Men With Direct, Indirect, and No Linkage to Female Sex Partners: Exploring the Potential for Sex Network Bridging in Baltimore City, MD · 2024 · DOI

  • Estimates of trends in incidence and overall impact on the health system are essential for syphilis prevention strategies, - Further public health interventions and strategies…

    Malignant Syphilis Mimicking Lymphoma in HIV: A Challenging Case and a Review of Literature Focusing on the Role of HIV and Syphilis Coinfection · 2025 · DOI

  • High prevalence of syphilis and HIV in sub-Saharan Africa - Limited access to antiretroviral therapy (ART) in the region - Need for effective public health strategies to reduce syphilis and HIV…

    The Association Between Syphilis Infection and HIV Acquisition and HIV Disease Progression in Sub-Saharan Africa · 2025 · DOI

  • There is a lack of understanding of the utility of dark-field microscopy, immunofluorescence, and histological analysis in diagnosing congenital syphilis - Current diagnostic methods have…

    What is the utility of dark-field microscopy, immunofluorescence, or histological analysis in congenital syphilis in Africa? · 2026 · DOI

Most-cited papers in Syphilis Diagnosis and Treatment

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Open questions raised by papers listed on this page include: (1) While the occurrences of Haemophilus ducreyi (HD) in yaws-like lesions has been widely documented, there is limited evidence regarding its influence on treatment outcomes assessed at the WHO-recommended 4-week follow-up (“Assessment of the role of Haemophilus ducreyi coinfection on outcomes of Yaws…”, 2026); (2) The WHO recommends benzathine penicillin G (BPG) as the standard treatment in pregnant women, whilst the optimal dosing strategy has not been established, particularly in relation to the impact of gestational age (“Pharmacokinetics of a three-dose regimen of intramuscular benzathine penicillin…”, 2026); (3) While recent national increases in unknown duration or late syphilis (UDLS) have outpaced diagnoses of earlier stages of syphilis, the causes and contributors remain unknown (“Unknown Duration or Late Syphilis Cases with High Titers—North Carolina, 2015…”, 2026); (4) There is a need to consider syphilis in patients with unexplained hair loss, even when penetrative intercourse is denied (“Case Report: Secondary syphilitic alopecia following non-penetrative sexual…”, 2026); (5) Distance and lack of transportation can act as structural barriers to successful screening (“Analysis of accessibility factors and community support for the success of the…”, 2026). 135 gap statements have been mined from Syphilis Diagnosis and Treatment papers in our 4.5M-paper local library, which holds 815 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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