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Definition of Tuberculin

Tuberculin: A protein extracted from Mycobacterium tuberculosis that is used in a skin test to determine if a person has been exposed to tuberculosis. The tuberculin preparation in most common use today is purified protein derivative (PPD) tuberculin. PPD is injected (or multiple-punctured) into the skin. If a reaction is seen at and around the site of injection, the test is positive. The PPD tuberculin test done by intradermal injection is also known as the Mantoux test.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=23027
Last Editorial Review: 6/14/2012

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