The tuberculin skin test,or the purified protein derivative (PPD)test,is based on:

Question

Quizplus · Accepted Answer

The tuberculin skin test,or PPD (purified protein derivative)test,is based on the premise that following infection with M.tuberculosis,a patient will develop a delayed hypersensitivity cell-mediated immunity to certain antigenic components of the organism.To determine whether a person has been infected with M.tuberculosis,a culture extract of M.tuberculosis (i.e. ,PPD of tuberculin)is intra-cutaneous injected.After 48 to 72 hours a person who has been infected will exhibit a delayed hypersensitivity reaction to the PPD.

The Tuberculin Skin Test,or the Purified Protein Derivative (PPD)test,is Based