Mantoux test (tuberculin skin test)
Quick answer: The Mantoux test checks whether your body has reacted to TB bacteria, using a small injection of tuberculin protein just under the skin of the forearm. It is used to look for TB infection, including latent TB, and may be one of several tests when genital TB is suspected.
- SampleSkin test (no sample)
- TakesA few minutes for the injection, plus a return visit 2 to 3 days later
- Before the testNo special preparation is needed, but you must come back 48 to 72 hours later to have the reaction read.
- In fertility careGenital tuberculosis is a known cause of infertility in India, and this test may be used alongside other tests when it is suspected.
How the test is done
- 1A nurse cleans the inside of your forearm
- 2A tiny amount of tuberculin is injected just under the skin, raising a small bump
- 3You go home and leave the spot uncovered
- 4You return after 48 to 72 hours so staff can measure any firm swelling
What your results can mean
Reading your report
The size of the firm swelling is measured, not the redness; a positive result does not by itself confirm active TB, and past BCG vaccination can affect it.
If the result is outside the usual range
A positive reaction can mean you have been infected with TB bacteria at some time, and a past BCG vaccine can also cause a reaction. A negative reaction makes TB infection less likely, but can be falsely negative in people with weak immunity.
Who usually has this test
People in contact with someone with TB, health workers, and some women with unexplained infertility where genital TB is suspected.
Risks and aftercare
The spot may itch or swell; do not scratch, rub or cover it, and tell staff if a large blister forms.
Names and options
Also called: TB skin test, tuberculin test, PPD test, TST
Listed by the hospital as
- MANTOUX TEST (TUBERCULIN TEST)
Questions about this test
Does the BCG vaccine affect the Mantoux test?
Yes, a past BCG vaccine can cause a positive reaction, though this usually fades over the years. Your doctor will read the size of the reaction with your history.
Can a Mantoux test diagnose genital TB?
No. It shows exposure to TB, not where an infection is. Genital TB needs other tests, such as samples from the womb lining.
What happens if I miss the reading appointment?
The reaction must be read 48 to 72 hours after the injection. If you miss this window, the test may need to be repeated.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
Reception
Waiting area
IVF lab
This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.