Montoux test is
Mantoux test is screening test for latent TB infection.
It has low sensitivity and specificity.
False positive reaction  - occur with BCG vaccination and False negative reactions - occur in immunocompromised individual.
Increase in induration (Boosting) is seen between 1 - 5 weeks after intial test.
Diagnostic test for TB
False positive reaction seen in  immunocompromised
Highly sensitive test and low specificity
Boosting is maximum after 4 weeks of initial test