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New TB skin test could spare rheumatoid patients from hidden infection

NCT ID NCT06796647

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tests a new skin test (C-TST) to find hidden tuberculosis (TB) infection in people with rheumatic diseases like rheumatoid arthritis who are about to start powerful medications called biologics. These drugs can reactivate dormant TB, so accurate screening is critical. Researchers will compare the new test with standard skin and blood tests in 100 adults, then follow them for two years to see who develops active TB.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ESAT6/CFP10 skin test (C-TST)
What this could lead to
If successful, this could provide a more accurate and convenient way to detect hidden TB infection in people with rheumatic diseases, helping prevent active TB when they start certain medications.
What could go wrong
This is a small, early-stage study with only 100 participants. The new test may not prove more accurate than existing methods, and results may not apply to all patient groups.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2025

Expected to finish

Aug 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Rheumatology patients followed up at the Specialist Services of regional hospitals in New Territories East Cluster in Hong Kong (Prince of Wales Hospital, Alice Ho Miu Ling Nethersole Hospital and North District Hospital)

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. adult of age ≥ 18 and up to 65 years; 2. diagnosis of at least one classified rheumatologic disease; and 3. being planned to receive b/tsDMARDs therapy, 4. can communicate in Chinese and/or English. Exclusion Criteria: * diagnosis of active TB diseases, * currently receiving TB or LTBI treatment; * concurrent mental illnesses; * prisoners.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites in 2 countries. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • S.H. Ho Research Centre for Infectious Diseases

    RECRUITING

    Hong Kong, Hong Kong, 0000, China

  • S.H. Ho Research Centre for Infectious Diseases

    NOT_YET_RECRUITING

    Shatin, Hong Kong, 0000, Hong Kong

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