The Tuberculin Response is Mediated By

Question

The tuberculin response is mediated by
A) memory T cells.
B) mast cells.
C) B lymphocytes.
D) plasma cells.
E) eosinophils.

Accepted Answer

The tuberculin response is a delayed-type hypersensitivity reaction that is mediated by memory T cells, specifically CD4+ T cells. These cells recognize antigens from Mycobacterium tuberculosis, the causative agent of tuberculosis, that are present in the tuberculin skin test. The resulting immune response leads to a localized inflammatory reaction that causes the characteristic induration and redness at the site of injection. Mast cells, B lymphocytes, plasma cells, and eosinophils are not involved in this process.