Question

Before working at the hospital, Beth was given a Mantoux skin test to detect tuberculosis. If it were positive, the site of the test would become hardened and red. What type of response is this?

Answer 1

The options are missing from the question,the missing options are;

a. Anaphylactic

b. Histamine

c. Immediate allergic

d. Delayed allergic

e. B-cell mediated.

The correct answer to the question is option D

DELAYED ALLERGIC.

Delayed allergic response is a type of late response to antigen that occurs 48-72hours after exposure to an antigen.

This type of allergic response is mediated by T-cells and macrophages.

They are otherwise known as delayed hypersensitivity response/reaction.

The response is delayed because there is sensitization upon first exposure to the antigen, therefore if there is a re-exposure,a secondary cellular response is initiated triggering the actions of the already sensitized T-cells and macrophages.