RESPIRATORY
OLD TUBERCULOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4 mm
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5 mm
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10 mm
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15 mm
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Detailed explanation-1: -The Mantoux tuberculin skin test (TST) is one method of determining whether a person is infected with Mycobacterium tuberculosis.
Detailed explanation-2: -PPD Skin Test/ Tuberculosis Skin Test This test was developed by Koch and further developed by Charles Mantoux, who described the intradermal technique in 1912. Tuberculin protein used in the test is extracted from mycobacterium tuberculosis cultures and is used as a purified protein derivative.
Detailed explanation-3: -The Mantoux tuberculin skin test (TST) is performed by placing an intradermal injection of 0.1 ml of purified protein derivative (PPD) containing 5 tuberculin units (TU) into the volar surface of the forearm.
Detailed explanation-4: -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.