Tuberculosis is a disease that is caused by bacteria called Mycobacterium tuberculosis. The bacteria usually attack the lungs, but other parts of the body can also be damaged. Tb spreads through the air when the person with Tuberculosis coughs or sneezes or even talks. If you think or even have the slightest doubt that you are exposed to the bacteria, you should go to your doctor for tests and screening.Tuberculosis is a life-threatening disease that is extremely contagious. Learn how to recognize the symptoms, how to prevent them, and how to get treated