The proportion of the several hundred different species of bacteria that comprise the intestinal flora is different from one individual to another. The specific mix of the trillions of microorganisms that compose an individual’s intestinal flora is established very early in life. This unique, individual intestinal flora tends to be maintained throughout life. Abnormalities in normal intestinal anatomy or function, as well as treatment with antibiotics, can sometimes result in disruption of a normal intestinal flora. With this disruption of the flora, it is possible that a less beneficial and sometimes even harmful, bacterial population may inhabit the bowel. The impact upon the intestinal flora, following a course of antibiotics, is usually temporary. However, with anatomical or functional impairments of the intestines, the establishment of an unhealthy intestinal flora can be longstanding.
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