BSIP, VEM / SCIENCE PHOTO LIBRARY BSIP, VEM / SCIENCE PHOTO LIBRARY
Pulmonary tuberculosis. Coloured X-ray of a human chest showing pulmonary tuberculosis. Both lung fields (dark) are affected, with diseased areas coloured red and fibrous. A primary tubercle (nodular lesion, red "ball") isin the lower region of a lung. The heart is at lower centre (white), with ribs of the ribcage seen (green). Tuberculosis (TB) is a disease caused by the bacterium Mycobacterium tuberculosis. When inhaled into the lungs, the bacteria form a lesion as here. They then spread to lymph nodes. In the lungs TB is also known as consumption or phthisis (wasting). Symptoms include fever, weight loss, night sweats and spitting of blood.
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