what is anaerobic bacteria?please explain in detail

Most of the bacteria are anaerobic that means they do not require oxygen for breathing or carrying out their metabolism and so are able to survive even in harsh conditions without oxygen. some examples of such bacteria are E.coli, Clostridium etc.

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An anaerobic organism or anaerobe is any organism that does not require oxygen for growth. It could possibly react negatively and may even die if oxygen is present. Most such species are unicellular microbes, though some are near-microscopic metazoa and some deep-sea worms. Some largely unicellular anaerobic microbes are protists, but most of the anaerobic microbes are bacteria or Archaea. For practical purposes there are three categories:

§  obligate anaerobes, which cannot use oxygen for growth and are even harmed by it

§  aerotolerant organisms, which cannot use oxygen for growth, but tolerate the presence of it

§  facultative anaerobes, which can grow without oxygen but can utilize oxygen if it is present

In human beings these organisms are usually found in gastrointestinal tract.

Anaerobic bacteria are bacteria that do not live or grow in the presence of oxygen.

In humans, these bacteria are most commonly found in the gastrointestinal tract. They play a role in conditions such as appendicitis, diverticulitis, and perforation of the bowel.

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