19 Dec Tuberculin test
Alternative Names: Mantoux test, TB test, Tine test, PPD skin test
A tuberculin, or TB, test is performed on the skin to find out whether or not you have antibodies to tuberculosis (TB). A small amount of TB protein (antigen) is injected under the skin on your forearm. This spot is re-examined after 48-72 hours. A negative result will not cause any skin reaction. A strongly positive result (e.g. inflamed and ulcerated skin) suggests that you are currently infected. For 100% accuracy, this test is usually used together with sputum culture tests and X-rays.
What is it?
The tuberculin test is a skin test that determines whether or not you have antibodies to tuberculosis (TB).
It is performed in your doctor’s rooms, a clinic, or in hospital.
Why is it done?
This test is done when a diagnosis of TB is being considered:
- A negative test means you have not been exposed to TB previously.
- A positive test result demonstrates the presence of antibodies, which means you have been exposed to TB previously.
- A strongly positive test result is very suggestive of current, active, infection.
The tuberculin test is far from 100% accurate, but is used in combination with other tests such as sputum culture tests and chest X-rays.
Before – how to prepare
No special preparation is necessary.
During – how the test is done
A tiny amount of TB antigen (protein) is injected under the skin, usually on the forearm. The site is marked and then re-examined after 48-72 hours. The presence and size of any skin reaction determines the result.
After the test
The site of the test may become very inflamed and even ulcerated in those who react very positively. Your doctor may treat this with creams and ointments.
Risks and Compilations
There are no significant risks associated with this test.
A tuberculin, or TB, test is performed on the skin to find out whether or not you have antibodies to tuberculosis (TB).
tuberculin test, TB test, mantoux test, Tine test, PPD skin test