E.coli is aerobe! it requires oxygen like us humans!
most of them are facultative anaerobes. oxygen is not pioson for them. M. pneumoniae is aerobe. there are also some strict anaerobes in bovine rumen.
Aerobes utilize and thrive in oxygen, anaerobes are killed/ fail to thrive in oxygen.
Facultative anaerobe
obligate aerobes require oxygen by using cellular respiration or fermentation in order to survive. obligate anaerobes do not require it and will die if they are exposed to oxygen.
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