What is Mantoux Test?
The Mantoux test is a screening test for tuberculosis. It is done if you have signs or symptoms of tuberculosis like fever, cough with sputum production, difficulty in breathing etc. A standard dose of 5 Tuberculin units is injected intradermally and read 48 to 72 hours later. This intradermal injection is referred as the Mantoux technique.
Why is Mantoux Test done?
- If you have signs or symptoms suggestive of tubercolosis like persistent cough, fever, night sweats, weight loss, fatigue
Interpreting Mantoux Test results
- The result of this test is interpreted in terms of induration (palpable, raised, hardened area) across the forearm in millimeters. If there is no induration, the result should be recorded as "0 mm" and it means that you have not been exposed to TB bacilli.
- Induration of 5 mm, 10 mm, and 15 mm is considered positive depending on the individual's risk factors. A positive test result indicates TB exposure.