Clinical trial No longer in our active list Interventional Ages 18 and up Men only

Improving chlamydia testing accuracy for MSM and trans-women

Official title: Meatal Swab Yourself With Testing for Infections Collectively (MYSTIC)

Run by The Leeds Teaching Hospitals NHS Trust · NCT05870098 · Data updated 2026-05-14

This study is no longer in our active list. It may have stopped recruiting or finished. The details below are as of 2026-05-14 and are kept for reference. Check ClinicalTrials.gov for its current status, or see similar studies below.

This study is testing new ways to improve chlamydia testing accuracy for men who have sex with men and trans-women by comparing group testing methods to traditional individual tests.

Quick facts

Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment1250 (estimated)
SponsorThe Leeds Teaching Hospitals NHS Trust
Academic / other
Locations1 site (Leeds, West Yorkshire)
Trial IDNCT05870098 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are MSM and trans-women aged 18 years or older who are attending a sexual health service for chlamydia and gonorrhea testing.

Probably not a fit

Patients who have taken antibiotics in the past 14 days or have previously participated in this trial may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to enhance the accuracy of chlamydia testing in men who have sex with men (MSM) and trans-women by comparing two new pooling methods against traditional separate sample testing. Participants will provide self-taken throat and rectal swabs, which will be pooled to assess if this method can maintain or improve diagnostic accuracy while reducing costs. The study also evaluates the effectiveness of using a meatal sample instead of urine in pooled testing. The goal is to ensure more accessible and accurate testing for chlamydia and gonorrhea in this population.

Why it matters

Potential benefit: If successful, this study could lead to more accurate and cost-effective testing for chlamydia and gonorrhea, improving health outcomes for MSM and trans-women.

How similar studies have gone: Previous studies have shown success in using pooled samples for gonorrhea testing, but the approach for chlamydia testing is still being evaluated.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* 18 years and over. Willing to perform self-taken swabs in addition to any clinician required swabs. Able to provide informed consent

Exclusion Criteria:

- Antibiotics taken in the past 14 days (excluding metronidazole). Previous participation in this trial

Where it's running

  • Leeds Teaching Hospitals NHS Trust
    Leeds, West Yorkshire, United Kingdom
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.