is tb contagious
Tuberculosis (TB) is a highly infectious disease that is caused by strains of bacteria that belong to the Mycobacterium tuberculosis complex. Though TB mainly affects the lungs, it could also affect other parts of the body.A person is diagnosed with pulmonary tuberculosis, when the lungs get infected.ulmonary tuberculosis is the most common form of tuberculosis. Bacteria that cause tuberculosis could also spread from the lungs to other parts of the body through blood or the lymph fluid. An active TB disease of the lungs, airways, or larynx is considered to be highly contagious.