GRAM2 - GRAMPOSITIVEBACTERIA LACTOBACILLALES

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GRAM-POSITIVE BACTERIA LACTOBACILLALES a.  Lactobacillus —although these organisms are unable to use oxygen, they are aerotolerant. They  ferment carbohydrates and produce large amounts of lactic acid as an end product. The resulting  acidity in their surroundings inhibits growth of many other types of competing bacteria. Humans  normally have lactobacilli in the vagina, intestinal tract, and the mouth. These harmless bacteria  play a major role in limiting the growth of potentially harmful species. In fact, during or  following antibiotic treatment, freeze-dried lactobacilli are sometimes used to help reestablish  normal balance in the intestine.  Lactobacilli also are responsible for production of sauerkraut, pickles, buttermilk, and yogurt.  b.  Streptococcus --these are gram-positive cocci, which are likely to grow in chains of varying  length. They are mostly aerotolerant, although a few are anaerobic. They are often classified by 
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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