Normal Flora - Normal Flora Typically, when one says...

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Normal Flora Typically, when one says "I have an infection" they mean to say "I have a disease", however the latter is not quite so socially acceptable. In fact, we are all "infected" with a variety of microorganisms throughout our entire lives. Incredibly, our bodies are actually composed of more bacterial cells than human cells; while the human body is made up of about 10 13 human cells, we harbor near 10 14 bacteria. This group of organisms, traditionally referred to as "normal flora" (although they are not plants) is composed of a fairly stable set of genera, mostly anaerobes. While each person has a relatively unique set of normal flora, members of the Streptococcus and Bacteroides make up a large percentage of the inhabitants. These organisms contribute to our existence in several ways. These normal flora may: Help us by competing with pathogens such as Salmonella Help us by providing vitamins or eliminating toxins (e.g. Bacteroides ) Harm us by promoting disease (e.g. dental caries)
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Normal Flora - Normal Flora Typically, when one says...

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