Positive tuberculin test means?
Resistance to TB
Susceptibility to TB
Hypersensitivity
None of the above
Ans. is 'c' i.e., Hypersensitivity 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.