Micro Final

Card Set Information

Author:
Anonymous
ID:
100145
Filename:
Micro Final
Updated:
2011-09-06 19:40:17
Tags:
UWS Micro
Folders:

Description:
Final
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user Anonymous on FreezingBlue Flashcards. What would you like to do?


  1. Exotoxin
    • secreted by gram + or -
    • foodborne illness
    • proteins, so immune sys forms antibodies
    • damage can occur before immune response formed

    released by every gram + except listeria
  2. exotoxins with specific targets
    Neurotoxins - act on nerves or motor end plates

    enterotoxins - act on GI tract = diahrrea

    cytotoxins - damage to cell mechanisms -> cell lysis
  3. Endotoxin
    LPS - lipid polysaccharide

    • immune response is due to innate immunitiy
    • they're heat stable
  4. LPS - lipid polysaccharide
    • composed of:
    • lipid a, core polysaccharide, O specific polysaccharide

    lipid a is the toxic part
  5. Gram + cocci
    staohylococcus or streptococcus
  6. staphylococcus
    • s. aureus
    • s. epidermis
  7. s. aureus
    • golden pigment
    • coagulase +
    • exotoxins
    • MRSA
  8. s. epidermidis
    • coagulase -
    • opportunistic pathogen
  9. differentiation of staph
    s. epidermis and s. aureus differentiation is important. check or coagulase
  10. streptococcus
    • chains, require rich media for growth
    • classification of strep is done through lancefield groups
  11. Hemolysis patterns
    ways to categorize streptococcus - hemolysis of blood cells
  12. a-hemolytic
    • partial hemolysis
    • -green around colonies
  13. B-hemolysis
    • complete lysis
    • -clear around colonies
  14. gamma y-hemolysis
    no lysis of blood cells
  15. lancefield groups
    • way to classify strep
    • use group a or group b only
  16. 4 groups used to classify strep
    • - lactic strep
    • -fecal strep
    • -viridans strep
    • -B-hemolytic strep
  17. Lactic strep
    • non pathogenic
    • no hemolysis = B-hemolytic
    • found in milk products
    • gives sour taste to foods when bad
  18. fecal strep
    • normal flora of GI tract
    • can be a-, B-, or y- hemolysis
    • opportunistic pathogen
    • cause UTI's
  19. viridans strep
    • a-hemolysis
    • normal flora of the mouth
    • cause tooth decay or bacterial endocarditis
  20. B-hemolytic strep
    • Lancefield group a = Strep pyogenes - major pathogen
    • group b = strep agalactiae
  21. Strep pyogenes
    • haluronic acid capsule
    • pyrogenic exotoxin
    • complete hemolysis
    • sensitive to bacitracin
    • causes: cellulitis, s. pharyngitis, scarlet fever
    • use blood agar plates to diagnose
  22. Strep agalactiae
    • normal flora of femal genital tract
    • causes neonatal meningitis, pneumonia - high mortality
  23. Strep pneumoniae
    • polysaccharide capsule
    • a-hemolysis
    • part of normal flora
    • infection (pneumonia) occurs if moves to lungs
    • causes meningitis or otitis media/sinusitis
    • use quellong rxn to diagnose
  24. Gram - diplococci
    • neisseria
    • - gonorrhoeae
    • - meningitis
  25. N. gonorrhoeae
    • pili and G- cell wall
    • males: acquired unprocted sex, causes urethritis, painful uriniation and discharge, some remain asymptomatic

    • females: from unprotected sex, most females are asymptomatic (reserviors) causes painful urination/discharge could lead to pelvic inflamatory disease PID
    • may see mother to child transmission
    • DX using oxidase test
  26. N. meningitidis
    • endotoxin and capsule
    • many healthy carriers
    • may cause meningitis
    • DX using oxidase test
  27. Gram + endospore rods
    • Clostridium or bacillus
    • - C. perfringens, c. botulinum, c. tetani, c. difficile
    • - B. anthracis, b. cereus
  28. gram + non endospore rods
    corynebacterium or listeria

    • - c. diphtheriae
    • - L. monocytogenes
  29. gram - rods
    • the enterics
    • within this family there are 3 coliforms
  30. coliforms
    ferment lactose with gas production, normal flora of the intestine but should not be outside intestine.

    • -e.coli
    • -k.pneumoniae
    • -enterobacter
  31. The enterics
    • gram - rods
    • e.coli
    • k.peumoniae
    • enterobacter
    • serratia
    • proteus
    • salmonella
    • shigella
  32. Pleomorphic gram - rods
    • yersinia
    • vibrio
    • campylobacter
    • helicobacter
  33. obligate anaerobic gram - bacteria
    • bacteroides fragilis
    • fusobacterium
  34. obligate aerobic gram - rods
    pseudomonas aeruginosa

What would you like to do?

Home > Flashcards > Print Preview