About: What barriers do bacteria face in the body   Sponge Permalink

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The first barrier, and perhaps the most effective, is the skin. After that it depends where the bacteria entered. Infections inside a tooth, for example, are exteremely hard to reach by the body's defenses and will not clear up on their own. The biggest barrier there would be confinement. The infection will likely build up pressure and burst into a new area, often painfully. There are also filters in the body called lymph nodes which trap foreign particles/bodies and can act as barriers to bacteria. Tonsils are an example of lymph nodes.

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  • What barriers do bacteria face in the body
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  • The first barrier, and perhaps the most effective, is the skin. After that it depends where the bacteria entered. Infections inside a tooth, for example, are exteremely hard to reach by the body's defenses and will not clear up on their own. The biggest barrier there would be confinement. The infection will likely build up pressure and burst into a new area, often painfully. There are also filters in the body called lymph nodes which trap foreign particles/bodies and can act as barriers to bacteria. Tonsils are an example of lymph nodes.
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  • The first barrier, and perhaps the most effective, is the skin. After that it depends where the bacteria entered. Infections inside a tooth, for example, are exteremely hard to reach by the body's defenses and will not clear up on their own. The biggest barrier there would be confinement. The infection will likely build up pressure and burst into a new area, often painfully. Infections can also be in the blood. In this case, if the population of bacteria is low and it is vulnerable to the body's immune system, then it's likely to be killed off rapidly due to the ease of transportation. If it's a major infection with a very large population or with highly resistant bacteria (which will likely soon have a very large population), it is critically dangerous as the ease of transportation will bring the infection everywhere in the body very rapidly. There are also filters in the body called lymph nodes which trap foreign particles/bodies and can act as barriers to bacteria. Tonsils are an example of lymph nodes. So, transportation can be a barrier or an asset depending on the species and the conditions. The skin is a major barrier for most bacteria, but it can be an asset in that it can isolate the bacteria from other bacteria and provide a constant environment. The immune system is a barrier to just about every bacteria except those which are immune to it. I know of none that are. HIV is a virus and so doesn't count. Lymph nodes are significant barriers only if the bacteria is moving around the body (as opposed to being isolated in one spot) and if the bacteria has not yet grown to an unmanageable size. This is an entire medical field and is not easily summarized. Different bacteria have very different properties and thus, have different barriers.
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