Incubation Period

The time from receipt of infection to the development of a positive tuberculin test ranges from 3 to 6 weeks, and thereafter, the development of disease depends upon the closeness and duration of contact, extent of the disease and sputum positivity of the source case (dose of infection) and host-parasite relationship. Thus the incubation period may vary from a week to a months or even years.
HIV is know to accelerate the progression of TB infection to disease.