Anonymous
Anonymous asked in Science & MathematicsBiology · 1 decade ago

explain how the body defends itself against the tb bacteria.?

people infected with a small number of tb bacteria often do not develop the disease. explain how the body defends itself against the tb bacteria.

thanks

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  • Anonymous
    1 decade ago
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    TB is an infection caused by the bacteria mycobacterium tuberculosis. The main way in which the infection becomes a problem is through its latency. This is because if you are exposed to TB your immune system will usually fight it off in the normal way that a bacterial infection is fought off, however with TB the bacteria becomes covered in small round lesions. When this occurs it is no longer a problematic infection and it cannot be passed on, but it is still present in the body. This is the latent stage of TB and it can re-occur later in life when the body is weakened.

    How your body defends itself? When you are exposed to any bacterial pathogen, the body will launch an immune response against the bacteria and produce antibodies to combat the infection. These antibodies themselves do not kill the bacteria but mark the bacteria so that when it passes through a macrophage rich area such as the spleen, the macrophages can target the invading organism for destruction. With the case of TB this process does not quite kill the bacteria but just disables it.

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