Posted in Web Signs & Symptoms | Basic TB Facts | TB | CDC January 5, 2021 Symptoms of TB disease depend on where in the body the TB bacteria are growing. TB bacteria usually grow in the lungs (pulmonary TB). TB disease in the lungs may cause symptoms such as a bad cough that lasts 3 weeks or longer https://www.cdc.gov/tb/topic/basics/signsandsymptoms.htm