The Walgreen Timetable predicts that pulmonary tuberculosis can manifest within months of primary infection, while miliary and meningeal tuberculosis typically occur 2-6 months later. TB adenitis usually develops 3-9 months after infection, while bones and joints tuberculosis can take several years, and renal and genital tuberculosis may take over a decade to manifest. Pulmonary lesions from reactivation of dormant foci take years after primary infection.

2.  Manifestation of TB in children can be predicted based
on the Walgreen Timetable highlighted below:
 Pulmonary tuberculosis – within a few months of
primary infection.
 Miliary and meningeal tuberculosis –2-6 months.
 TB adenitis - 3-9 months.
 Bones and joints – several years.
 Renal and genital tuberculosis –may take over a
decade.
 Pulmonary lesions occurring as a result of reactivation
of a dormant focus previously established in the body
takes a number of years after primary infection.

6.  Wallgren, A, The time table of tuberculosis.
Tubercle,(1938)29,245.
 Wallgren, A. , Pulmonary tuberculosis in adults
and children (1939), Thomas Nelson and Sons,
New York.