Clinical trial Recruiting at 1 site Observational Ages 18 to 100

Understanding TB Infection Risks in Health Workers

Official title: THWART-TB: Testing Health Workers At Risk to Advance Our Understanding of TB Infection

Run by Beth Israel Deaconess Medical Center · NCT06221488 · Data updated 2026-11-12

This study is trying to understand how health workers in Cape Town respond to tuberculosis infections over a year to find better ways to protect them from getting sick.

Quick facts

Study typeObservational
Ages18 Years to 100 Years
SexAll
Enrollment300 (estimated)
SponsorBeth Israel Deaconess Medical Center
Academic / other
Locations1 site (Cape Town)
StatusRecruiting
StartedJanuary 15, 2024
Main results expectedDecember 31, 2028
Study endsDecember 31, 2029
Registry record updatedJuly 8, 2026
Trial IDNCT06221488 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are health workers aged 18 and older who can provide informed consent.

Probably not a fit

Patients with a prior history of TB or those who have previously tested positive for TB infection will 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 observational study focuses on health workers in Cape Town, South Africa, who are at high risk for tuberculosis (TB) infection. It aims to evaluate immune responses to TB through frequent testing every three months over a year, using a combination of novel assays. By characterizing the dynamic immune responses at the time of initial infection, the study seeks to improve understanding of TB infection and identify individuals at risk of developing active TB disease. The findings will help inform targeted preventive strategies for those exposed to TB.

Why it matters

Potential benefit: If successful, this study could lead to better identification of individuals at risk for developing active TB, enabling more effective prevention strategies.

How similar studies have gone: While there have been studies on TB infection, this approach of using a combination of novel assays in a high-risk cohort is relatively novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* ≥18 years old
* Health worker
* Able to provide informed consent

Exclusion Criteria:

* Prior history of TB or known prior positive IGRA
* Current or prior history of taking anti-TB treatment

Where it's running

  • Stellenbosch University
    Cape Town, South Africa
    Recruiting

Study contacts

  • Principal investigator: Ruvandhi Nathavitharana, MBBS MPH — Beth Israel Deaconess Medical Center
  • Study coordinator: Ruvandhi Nathavitharana, MBBS MPH
  • Email: rnathavi@bidmc.harvard.edu
  • Phone: +16467152601

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.