Mycobacterium tuberculosis tuberculin test

Purified protein derivative (PPD) Material used in the tuberculin skin test, the most common test for exposure to Mycobacterium tuberculosis. 

Tuberculin skin test An immunological test for tuberculosis in which a purified protein derivative from the Mycobacterium tuberculosis is injected subcutaneously, resulting in an induration if there was previous exposure to the bacterium. 

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