MM3 GI tract

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maria_mm_10
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249714
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MM3 GI tract
Updated:
2013-11-29 22:23:29
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MM3 GI tract
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MM3 GI tract
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  1. How much bacteria in what location and for how long?
    • Stomach 103 about 15-20 min 
    • Small intestine 106 about 2-3 hours 
    • Colon 1012 about 24-72 hours
  2. What are the 5 etiological agent that are likely to cause toxin actions in the GI tract?
    • Clostridium batulinum 
    • Staph aureus (food poisoning)
    • Bacilus cereus 
    • Clostridium difficile 
    • Enterotoxigenic E. coli (ETEC)
  3. Action of toxins table 14-3
  4. What etiological agent causes gastritis?
    Heliobacter pylori
  5. What kind of bacteria is
  6. What kind of bacteria is helicobacter pylori?
    • gm - spirillum
    • or bacillary form w/ sheathed flagella
  7. What are the lab test of helicobacter pylori?
    Catalase, urease + and oxidase +
  8. helicobacter pylori what kind of other test?
    • dont ferment or oxidize carbohydrates
    • DIFFICULT to culture
  9. How does bacteria live in acid stomach?
    creating microenvironment
  10. How does it enter? secretes?
    • penetrates mucus to epithelium 
    • endotoxin--> inflammatory response
  11. What of helicobacter pylori has low activity?
    Lipid A low endotoxin activity
  12. helicobacter pylori causes what %?
    • 80% of gastric ulcers 
    • 90% dueodenal ulcers
  13. Lower GI diseases such as what 3?
    • Gastroenteritis-(NVD)
    • Pysentery-diarrhea w/ pus/blood in stool 
    • Enteric fever- high fever & abscesses
  14. What kind of bacteria is vibrio? How many chromosomes?
    • gm - mesophillic, curved rods 
    • 2 chromosomes 
  15. Where is vibrio found? degrades what?
    • estuarine and marine waters 
    • chitin
  16. What kind of host does vibrio have?
    humans, oysters, clams, fish, mussels, plankton, shellfish
  17. How many biotypes are there of V. vulnificus?
  18. What does biotype 1 do?
    • opportunistic human pathogen
    • gastroenteritis, primary septicemia & wound infections (necrotizing fascitis) 
  19. Biotype 2
    eel pathogen 
  20. Biotype 3 
    • Human wound infections 
    • fisherman handling tilapia 
  21. Vibrio Cholera, found where, prod what?
    • rice water stools
    • killed by acidic conditions 
    • cont water w/ human feces 
    • A-B exotoxins 
  22. What is the action of Cholera toxins?
    • B subunit binds to host cell surface 
    • A subunit enters cell 

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