All of the following are true for a positive tuberculin skin test EXCEPT:

Question

Quizplus · Accepted Answer

A positive tuberculin skin test does not necessarily signify active disease in all patients. It indicates the presence of a delayed-type hypersensitivity reaction to the purified protein derivative, which is used as the antigen to test for tuberculosis. Redness and some swelling is typically observed in the area where the test was administered. However, a positive test only indicates the presence of latent tuberculosis, which may or may not progress to active disease in the absence of treatment.

All of the Following Are True for a Positive Tuberculin