MARTIN M. ROTKER / SCIENCE PHOTO LIBRARY MARTIN M. ROTKER / SCIENCE PHOTO LIBRARY
Gross specimen of human lungs with tuberculosis. Tuberculosis (TB) is a common, often deadly disease caused by the bacteria Mycobacterium tuberculosis. It usually attacks the lungs (pulmonary TB), but can also infect the central nervous; lymphatic; circulatory; genitourinary; and gastrointestinal systems. It can also impact the bones, joints, and sometimes the skin. Tuberculosis is classified as one of the granulomatous inflammatory conditions.
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