MRCP UK EXAMINATIONS

Detailed explanation-1: -The Mantoux test does not measure immunity to TB but the degree of hypersensitivity to tuberculin. There is no correlation between the size of induration and likelihood of current active TB disease but the reaction size is correlated with the future risk of developing TB disease.

Detailed explanation-2: -Tuberculin test, also known as PPD test, is an intradermal test that diagnoses type IV hypersensitivity caused by tuberculosis bacillus infection by intradermal injection of tuberculin and according to the skin condition of the injection site.

Detailed explanation-3: -There are two kinds of tests used to detect TB bacteria in the body: the TB skin test (TST) and TB blood tests. A positive TB skin test or TB blood test only tells that a person has been infected with TB bacteria. It does not tell whether the person has latent TB infection (LTBI) or has progressed to TB disease.

Detailed explanation-4: -The Mantoux tuberculin skin test is a test to check if a person has been infected with TB bacteria.