How do you read Mantoux results?
The reaction is read by measuring the diameter of induration (palpable raised, hardened area) across the forearm (perpendicular to the long axis) in millimeters. If there is no induration, the result should be recorded as “0 mm”. Erythema (redness) should not be measured.
How do you determine whether a Mantoux test result is positive or negative?
The test is “positive” if there is a bump of a certain size where the fluid was injected. This means you probably have TB germs in your body. Most people with a positive TB skin test have latent TB infection. To be sure, your doctor will examine you and give you a chest x-ray.
How do you know if you TB test is positive?
If you have a latent TB infection, your skin will be sensitive to PPD tuberculin and a small, hard red bump will develop at the site of the injection, usually within 48 to 72 hours of having the test. If you have a very strong skin reaction, you may need a chest X-ray to confirm whether you have active TB disease.
What does a positive Mantoux test indicate?
A: A positive Mantoux test means that the person has been exposed to TB organisms sometime in the past and it does not necessarily mean that she has active tuberculosis. The doctor would need some definitive evidence that your friend has active TB either in the lungs, glands or somewhere else in the body.
What are the normal readings for Mantoux test?
Normal values of mantoux test Mantoux test reading 25mm Normal range for mantoux test Mantoux test reading
What does this Mantoux test result indicate?
A positive Mantoux tuberculin skin test or interferon gamma release assay (IGRA) test result means that the person is likely to have been exposed to tuberculosis and the person may have a latent or active tuberculosis infection.
What does Mantoux test mean?
Mantoux test. A skin test for resistance to TUBERCULOSIS in which a small quantity of a sterile liquid derived from a culture of tubercle bacilli ( tuberculin ) is injected into the skin and the local reaction noted.