A Positive Tuberculin Skin Test is an Example Of

Question

A positive tuberculin skin test is an example of
A)delayed cell-mediated immunity.
B)autoimmunity.
C)acute contact dermatitis.
D)psoriasis.
E)innate immunity.

Accepted Answer

A positive tuberculin skin test indicates the presence of delayed cell-mediated immunity, which is a type of adaptive immunity that involves T cells and macrophages. This type of immunity takes time to develop, which is why the skin test reaction does not appear until 48-72 hours after exposure to the antigen. Autoimmunity, acute contact dermatitis, and psoriasis are not related to the tuberculin skin test, and innate immunity does not involve T cells and does not produce a positive skin test reaction.