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Tuberculosis infection (TB)

A chronic bacterial infection caused by the bacteria, Mycobacterium tuberculosis, that mainly affects your lungs. TB is a contagious infectious disease which is spread from person to person through the air. The bacteria are released into the air when an infected person coughs or sneezes, and infects those who inhale the droplets. Most people do not have any symptoms when first infected. The bacteria can lay dormant (called latent TB) in the body and may become reactivated many years later. This reactivation usually occurs when the immune system becomes depressed. Chronic illness, malnutrition, alcoholism, the use of immunosuppressive drugs, AIDS and cancer can all suppress the immune system leading to the spread of the disease. The initial lung infection can then spread to all parts of the body, including kidneys, spine or brain.
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