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Related Concept Videos

Trichomoniasis01:18

Trichomoniasis

Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.

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Related Experiment Video

Updated: Jun 15, 2026

Trichuris muris Infection: A Model of Type 2 Immunity and Inflammation in the Gut
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Characterizing trachoma elimination using serology.

Everlyn Kamau1, Pearl Anne Ante-Testard2, Sarah Gwyn3

  • 1F.I. Proctor Foundation, University of California San Francisco, San Francisco, CA, USA. everlyn.kamau@ucsf.edu.

Nature Communications
|July 2, 2025
PubMed
Summary
This summary is machine-generated.

Serological surveillance using Chlamydia trachomatis IgG antibody measurements in children can guide trachoma elimination efforts. New thresholds for seroconversion rates (SCRs) help determine when to stop or continue control interventions.

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Area of Science:

  • Ophthalmology
  • Infectious Disease Epidemiology
  • Public Health

Background:

  • Trachoma elimination is a global public health priority by 2030.
  • Serological IgG antibody measurements in children are being explored for surveillance.
  • Lack of programmatic guidelines for serology hinders effective disease elimination strategies.

Purpose of the Study:

  • To develop a novel serological approach for estimating Chlamydia trachomatis transmission.
  • To establish evidence-based thresholds for seroconversion rates (SCRs) to guide trachoma control decisions.
  • To inform programmatic decision-making for global trachoma elimination.

Main Methods:

  • Collation of Chlamydia trachomatis Pgp3 and CT694 IgG measurements from 48 serosurveys.
  • Analysis of data from 41,168 children aged 1-5 years across Africa, Latin America, and the Pacific Islands.
  • Development of a probabilistic model to estimate transmission levels relative to intervention needs.

Main Results:

  • Proposed SCR thresholds for halting control measures (>90% certainty) at ≤2.2 per 100 person-years.
  • Proposed SCR thresholds indicating need for continued interventions (>90% certainty) at ≥4.5 per 100 person-years.
  • Demonstrated that more extreme SCR thresholds increase confidence in elimination or need for action.

Conclusions:

  • Trachoma serosurveys provide a robust method for guiding elimination program decisions.
  • Established SCR thresholds offer objective criteria for programmatic action.
  • This approach supports the global goal of trachoma elimination as a public health problem.