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Tuberculosis (TB) is a bacterial infection. It is spread by inhaling tiny droplets of saliva from the coughs or sneezes of an infected person.

Mycobacterium tuberculosis is the bacteria responsible for TB. Mycobacterium tuberculosis are very slow moving, so a person may not experience any symptoms for many months, or even years, after becoming infected.

TB primarily affects the lungs (pulmonary TB). However, the infection is capable of spreading to many different parts of the body, such as the bones or nervous system. Typical symptoms of TB include a persistent cough, weight loss and night sweats.

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14y ago

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