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6 Cards in this Set
- Front
- Back
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Where does the majority of the normal flora in the human body reside in/
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the GI tract
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What does the GI tract include?
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Stomach
Small intestine Large Intestine |
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What are the majority of the bacteria in the GI tract?
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Anaerobes
-E. coli (faculative anaerobe) Bacteroides (strict anaerobe) Lactobacillus (aerotolerant anaerobe) |
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Why is the bacterial count of the stomach really low?
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Because the stomach is very acidic and is a barrier to most microbial growth
-Bacterial count of the stomach is usually very low and considered to be devoid of any significant normal flora -Only a few acid-tolerant bacteria can be cultured from the stomach |
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Character of bacterial flora changes along the length of the GI tract. Bacteria occupy the lumen, overlie the epithelial cells and adhere to the mucosa of the intestines.
Describe the type of the bacteria when growing through the GI tract. |
Most of these organisms are dervied from oral cavity and pass through the gut with each meal
1) Duodenal flora = sparse 2) Ileum = Moderately mixed flora 3) Large Intestine = Dense and contains a diverse population of bacteria |
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What's so special of the large intestine?
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It is an anaerobic bacterial fermentation chamber.
-Any oxygen that may be present is quickly consumed by facultative anaerobes |
