Monday, November 16, 2009

How long can tuberculosis bacteria last outside the body


How long can tuberculosis bacteria last outside the body?
Such as on surfaces or in the air.
Infectious Diseases - 2 Answers
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1 :
Mycobacterium tuberculosis can live only in people; it cannot be carried by animals, insects, soil, or other nonliving objects. A person can be infected with tuberculosis only from another person who has active disease. Touching someone who has the disease does not spread it, because the bacteria are transmitted only through the air. Mycobacterium bovis, a bacterium that can live in animals, is an exception. In developing countries, children become infected with it by drinking unpasteurized milk from infected cattle. People with active tuberculosis in their lungs contaminate the air with bacteria when they cough, sneeze, or even speak. These bacteria can stay in the air for several hours. If another person breathes them in, that person may become infected. People who have latent disease or tuberculosis that is not in their lungs do not spread bacteria into the air and cannot transmit the infection.
2 :
It can't last outside the body because it is a fastedious organism that needs special atmosphere to grow in



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