Tuberculosis (TB) is an infection. TB may be either active or latent. Latent forms can stay in your body and not make you sick. Latent TB may become active if you are ill, have a weakened immune system, or for no known reason.

TB infection most is most common in the lungs, but it can occur in other places in the body.

TB is a highly contagious disease caused by a specific bacteria. It is transmitted by air from one person to another. This can happen during coughing, sneezing, or talking. Once airborne, the bacteria can be breathed in by other people causing exposure or active infection. You can only pass the infection to other people if you have active TB.

Pathway to the Lungs
Air pathway breathing
Bacteria is inhaled through the mouth and nose and travels down into the lungs causing TB.
Copyright © Nucleus Medical Media, Inc.