Tuberculosis (TB) is a disease caused by bacteria called Mycobacterium tuberculosis. There are two phases: latent TB infection and active disease. Active TB disease most often affects the lungs, although it can involve any part of the body.
TB is spread through the air. Extended close contact with someone who has active, infectious TB disease is typically required for TB to spread. TB bacteria are put into the air when a person with active TB disease of the lungs or throat coughs, sneezes, speaks or sings. People nearby may breathe in these bacteria and become infected.
TB is curable and can be prevented. Testing is simple. Treatment is free.
If you have questions about TB infection or disease, or for health care providers with inquiries about TB, call the TB Intake Line at 703‑246‑2433.