They find their way inside a histiocyte (dendritic cell) and wage a war against your body... And they will win.

M. Tuberculosis growing on L-J medium

It looks like something from an alien movie

Gram-staining of M. tuberculosis

Culture

Exposure

Pathophysiology of TB

Primary "active" tuberculosis

A summary of active TB

Secondary "reactivated" TB

PPD test, Tuberculin test, or Mantoux test

Investigations and tests

QuantiFERON-test, or IGRA-test