Tuberculosis is a contagious bacterial disease that primarily involves the lungs. Tuberculosis may develop after inhaling infected droplets sprayed into the air from a cough or sneeze of someone infected with Mycobacterium tuberculosis.
Review Date 12/4/2022
Updated by: Jatin M. Vyas, MD, PhD, Associate Professor in Medicine, Harvard Medical School; Associate in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.