lecture 10.txt

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Author:
epaynich
ID:
16463
Filename:
lecture 10.txt
Updated:
2010-04-27 15:27:55
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Micro lecture
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Micro 221 lecture 10
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  1. lecture 10
    control of growth
  2. no microorganism on a surface
    sterilize
  3. reduce the number of microbes
    pasteurize
  4. used to kill most pathogens on an inanimate surface
    disinfectant
  5. used to kill most pathognes on living tissue
    antiseptic
  6. reduce pathogens to a standard safe level
    decontaminate
  7. reduce all organisms to a set safe level
    sanitize
  8. protozoa with tough membrane that is resistant to chemicals
    cyst
  9. virus with no lipid envelope that is resistant to drying and isinfectants
    naked virus
  10. lipid coated virus which is easy to get rid of with drying
    enveloped virus
  11. time it takes to kill 90% of organisms
    decimal reduction time
  12. instruments which come in contact with body tissues which must be sterile
    critical instrument
  13. instrument which comes in contact with mucous membranes and can have spores
    semicritical instrument
  14. instrument which only comes in contact with external organs and only needs low level disinfectant
    noncritical instrument
  15. uses steam to heat at 121 degrees Celsius for 15 to 45 minutes; achieves sterilization
    autoclave
  16. kills 99.9995 of bacteria by heating at 72 degrees Celsius for 12 seconds; type of pasteurization
    htst pasteurization
  17. sterilizes by heating at 150 degrees Celsius for 1 second
    uht pasteurization
  18. membrane made out of a dense polymer with .2 micrometer holes to filter bacteria out of liquid
    membrane filter
  19. used to filter bacteria out of air by trapping organisms in mesh
    depth filter
  20. high energy wavelengths that penetrate surfaces to sanitize foods or surgical materials
    ionizing radiation
  21. chemical that kills everything including spores
    sterilant
  22. chemical that kills everythign but spores; can be used on semicritical instruments
    high level disinfectant
  23. kills everythign but spores and a few viruses; used for noncritical instruments
    intermediate level disinfectant
  24. allow some mycobacteria naked viruses and spore to survive
    low level disinfectant
  25. rigidify proteins so they can�t unfold or die
    aldehyde
  26. makes membranes leaky; used in mouthwash and skincare
    chlorihexidine
  27. gaseous sterilant that oxidizes DNA
    ethylene oxide
  28. oxidizes protein so they can�t function
    halogen
  29. uses heavy metals to prevent disulfide bonds in cysteine
    derivatize
  30. dissolve lipid membranes
    phenolic
  31. targets specific part; bacteria become resistant
    triclosan
  32. dissolve membranes; used in soaps and cosmetics; low level
    quaternary amine

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