Intestinal Flora - vagina and the distal 1 cm of the...

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Intestinal Flora The intestinal tract is a rather hostile environment for microorganisms yet the bulk of our normal flora inhabit this region of the body. In fact, the colon may contain 10 9 to 10 11 bacteria per gram of material. Most (95 - 99.9%) of these are anaerobes, represented by Bacteroides , Bifidobacterium , anaerobic streptococci and Clostridium . These organisms inhibit the growth of other pathogens but some can be opportunistic (e.g. C. difficile can produce pseudomembranous colitis). Urogenital Flora The urogenital tract is normally sterile with the exception of the
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Unformatted text preview: vagina and the distal 1 cm of the urethra. Various members of the genus Lactobacillus predominate in the vagina. These organisms generally lower the pH to around 4-5, which is optimal for the lactobacilli but inhibitory for the growth of many other bacteria. Loss of this protective effect by antibiotic therapy can lead to infection by Candida ("yeast infection"). The urethra may contain predominantly skin microorganisms including staphylococci, streptococci and diphtheroids....
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This note was uploaded on 11/05/2011 for the course BIOLOGY MCB2010 taught by Professor Jessicadigirolamo during the Fall '10 term at Broward College.

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