MM3 Enterobacteria

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MM3 Enterobacteria
2013-11-30 17:43:25
MM3 Enterobacteria

MM3 Enterobacteria
Show Answers:

  1. How many species cause Shigellasis?
    4 (S. dysenterine, S. flexerii, S. baydii, and S. serreri)
  2. What kind of bacteria is this?
    non-motile enteric bacteria
  3. What does this bacteria invade?
    lymphoid tissue in the lower intestine
  4. What can certain strains produce?
    A-B toxins
  5. What does the A subunit bind to? Causes?
    • binds to host cell ribosome 
    • =inhibition of protein synthesis 
  6. What are the signs/symptoms of of dysentery?
    What bacteria produces is different strain of dysentery?
    • diarrhea w/blood, pus, severe cramping 
    • E. coli --> it is motile
  7. What is gastroenteritis? caused by what?
    • inflammation of the stomach intestines 
    • several types of E. coli
  8. What are the 5 bacteria of E. coli?
    • Enterotoxigenic (ETEC)
    • Enteroinvasive (EIEC)
    • Enteropathogenic (EPEC)
    • Enterohemorrhage (EHEC)
    • Enteroaggregative (EAEC)
  9. What is ETEC known for? What 2 toxins does it produce?
    • traveler's diarrhea/infantile diarrhea
    • cholrea-like toxin & heat stable toxin=emetic
  10. What is EPEC known for?
    • loss of microvilli
    • seen w/ nasoconical neonatal diarrhea
  11. EHEC also know as what? Has a large what?
    • STEC 
    • larger genome (pathogenetic islands)
  12. What is EHEC (STEC) similar to?
    toxin & of Shigella (verotoxin)
  13. What disease can EHEC lead to?
    • hemalytic uremic syndrome (HUS)
    • kidney failure
  14. The BIG 6 of E. coli are in what type of E. coli?
    STEC or EHEC
  15. What is a pathogenicity island?
    • huge chunk of DNA 
    • about 10-100 kb
  16. pathogenicity island contains genes for what?
    • for virulence 
    • moves together