ArticleClinical infectious diseases : an official publication of the Infectious Diseases Society of America2022
Incidence and Duration of Pharyngeal Chlamydia Among a Cohort of Men Who Have Sex With Men.
Article in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- An agent-based platform for simulating the impact of chlamydia vaccine in the US population.Nature communications · 2026Article
- Prevalence, Duration, and Severity of Rectal Symptoms Among Men Who Have Sex With Men With Rectal Sexually Transmitted Infections.Open forum infectious diseases · 2026Article
- Sexually transmitted infection prevalence and Neisseria gonorrhoeae antimicrobial resistance patterns in men who have sex with men with or without urethral discharge syndrome in Johannesburg, South Africa, 2024.PLOS global public health · 2026Article
- Article
- Chlamydia and Gonorrhea Infections in Genital and Extragenital Samples Among Men and Women.Sexually transmitted diseases · 2025Article
- High Incidence and Duration of Antibiotic Use Among a Cohort of Men Who Have Sex With Men in Seattle, Washington.Open forum infectious diseases · 2025Article
- Review: Known, Emerging, and Remerging Pharyngitis Pathogens.The Journal of infectious diseases · 2024Review
- Changes in Inflammatory Cytokine Levels in Rectal Mucosa Associated With Neisseria gonorrheae and/or Chlamydia trachomatis Infection and Treatment Among Men Who Have Sex With Men in Lima, Peru.The Journal of infectious diseases · 2024Article
- Incidence and spontaneous clearance of gonorrhea and chlamydia infections among men who have sex with men: a prospective cohort study in Zhuhai, China.Frontiers in public health · 2024Article
- Controversies and evidence on Chlamydia testing and treatment in asymptomatic women and men who have sex with men: a narrative review.BMC infectious diseases · 2022Review
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Authors and funding
5 authors.
Funding
Abstract
backgroundThe prevalence of pharyngeal chlamydia is low, but its incidence and duration are unknown. A high incidence or duration may support the role of pharyngeal chlamydia in sustaining chlamydia transmission.
methodsFrom March 2016 to December 2018, we enrolled men who have sex with men (MSM) in a 48-week cohort study in Seattle, Washington. Participants self-collected pharyngeal specimens weekly. We tested specimens using nucleic acid amplification testing at the conclusion of the study. In primary analyses, we defined incident pharyngeal chlamydia as >2 consecutive weeks of a positive pharyngeal specimen. In sensitivity analyses, we defined incident chlamydia as >1 week of a positive specimen. We estimated duration of pharyngeal chlamydia, censoring at loss to follow-up, receipt of antibiotics, or end of study.
resultsA total of 140 participants contributed 70.5 person-years (PY); 1.4% had pharyngeal chlamydia at enrollment. In primary analyses, there were 8 pharyngeal chlamydia cases among 6 MSM (incidence = 11.4 per 100 PY; 95% confidence interval [CI]: 6.0-21.9). In sensitivity analysis, there were 19 cases among 16 MSM (incidence = 27.1 per 100 PY; 95% CI: 18.5-39.8). The median duration was 6.0 weeks (95% CI: 2.0-undefined) in primary analysis and 2.0 weeks (95% CI: 1.1-6.0) in sensitivity analysis. Duration was shorter for those with a history of chlamydia compared with those without (3.6 vs 8.7 weeks; P = .02).
conclusionsPharyngeal chlamydia has a low incidence and duration relative to other extragenital sexually transmitted infections. Its contribution to population-level transmission remains unclear.
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