True about montoux is –

A. False negative in fulminant diseases

B. If once done, next time it is always positive

C. Results are given in terms of positive & negative

D. Indurations given in terms of length & breadth

Correct Answer: False negative in fulminant diseases

Description: Ans. is 'a' i.e., False negative in fulminant disease . A positive tuberculin test indicates hypersensitivity to tuberculoprotein, it may be due to : - Active infection - Subclinical infection - Past infection - BCG vaccination . In overwhelming tuberculosis (fulminant cases) due to depressed cellular immunity montoux test may be false negative.

Category: Microbiology

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