micro chaoter 18

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Author:
alicia0309
ID:
276004
Filename:
micro chaoter 18
Updated:
2014-06-03 00:09:46
Tags:
micro
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Description:
exam 3 chapter 18
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  1. All Staph are ...
    Gram +, but lack spores and Flagella

    • S. aureus coagualse +
    • S. epidermidis, hominis, capitis and saprophyticus are coagulase -
  2. where do the different staphylococci live on the body?
    • epidermidis - lives on the skin
    • hominis - apocrine sweat glands
    • capitis - scalp, face external ear
    • saprophyticus - infrequently lives on skin, usually on intestine and vagina, causes UTI
  3. S. hominis
    • apocrine sweat glands
    • coagulase negative, gram +

  4. S. aureus
    • MRSA
    • treat with Vancomycin
  5. Streptococcal

    S. prygenes
    • Group A
    • Strict Parasite {has to have host}
    • most serious streptococcal pathogen
    • Induces high fever
    • treat with PCN

    Gram +, NonSpore Forming, Facultative anaerobe
  6. Streptococcal 

    S. agalactiae
    • Group B
    • can be transmitted to infant during birth
    • most prevalent cause of neonatal pneumonia, sepsis and meningitis
    • Treat with PCN

    Gram +, nonspore-forming, facultative anaerobe
  7. Virdans Streptococci
    • most common gums, teeth and oral cavity
    • Dental procedure and surgical facilitated entrance

    Gram+, nonspore-forming
  8. Streptococcal 

    S. Pneumonia
    • delicate, does not survive long outside habitat
    • culture dies in oxygen
    • lacks catalase and peroxidase

    • Quellung Test
    • Treat with PCN G or V
  9. Entercoccus faecalis
    • Group D
    • normal flora of large intestine 
    • opportunistic
    • usually required combo therapy
  10. to ID strep
    • culture using bactracin disc test
    • CAMP test
    • Esculin hydrolysis
  11. Neisseria gonorrhoeae
    • cannot grow on media, has to be grown on living cell
    • Newborns can be infected as they pass thru birth canal - eye inflammation, can cause blindness
    • Treat with PCN G, some new cases are resistant to PCN and Tetracycline
    • Gram -, 
  12. Neisseria Meningitidis
    • Gram -, no spores, No Flagella,
    • Strict parasite
    • to Dx: Gram stain, CSF, Blood, or nasopharyngeal sample
    • Treat with PCN G or Cephalosporin

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