Clinical trial Recruiting at 1 site Observational Ages 18 and up Women only

Using urine to study immune responses to chlamydia

Official title: Using Urine to Study Antibodies & Functional Cell-Mediated Immunity in the Context of Chlamydia Trachomatis

Run by Universiteit Antwerpen · NCT07596316 · Data updated 2026-11-12

This study tests whether first-void urine and self-collected vaginal swabs can reveal immune signals against Chlamydia trachomatis in adult women who test positive.

Quick facts

Study typeObservational
Ages18 Years and up
SexWomen only
Enrollment73 (estimated)
SponsorUniversiteit Antwerpen
Academic / other
Locations1 site (Antwerp, Antwerp)
StatusRecruiting
StartedDecember 10, 2025
Main results expectedJune 2027
Study endsJune 2027
Registry record updatedMay 19, 2026
Trial IDNCT07596316 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adult women with a CT-positive vaginal sample or first-void urine, who can self-collect specimens and provide informed consent.

Probably not a fit

Individuals not able to provide self-collected samples or who have conditions that confound immune measurements may not benefit.

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

What this trial studies

This observational study explores non-invasive samples collected by participants to detect mucosal and systemic immune responses to Chlamydia trachomatis. Researchers will compare CT-specific antibodies and cellular responses in urine and vaginal samples with blood samples, aiming to assess feasibility and concordance. The study also investigates how local genital tract immunity relates to systemic immunity. Eligible participants are adult women with CT-positive samples who consent to self-collection and an in-clinic blood draw and questionnaire completion.

Why it matters

Potential benefit: If successful, the approach could enable easier, person-friendly monitoring of CT immune responses without invasive blood draws.

How similar studies have gone: Preliminary work suggests urine and vaginal samples can reflect mucosal immune activity, but standardized methods are not yet established, making this pilot important.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Female
* Chlamydia trachomatis NAAT positive vaginal sample or first-void urine sample.
* Able to understand the information brochure and what the study is about.
* Willing to give informed consent to use their samples for details described in the study protocol.

Exclusion Criteria:

* Pregnancy (self-reported)
* Being positive for Human Immunodeficiency Virus (HIV)
* Women that underwent hysterectomy.
* Menstruation at the time of sample collection.
* Current use of antibiotics effective against Chlamydia trachomatis (doxycyline or azithromycine) or use of such antimicrobials in the past 14 days before participating in the study.
* Participating in another clinical trial at the same time of participating in this study.
* Having a history or current evidence of any condition or abnormality that might confound the results of the study or is not in the best interest of the individual to participate, in the opinion of the investigator.

Where it's running

  • Violett Antwerp
    Antwerp, Antwerp, Belgium
    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.