Letter T

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

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