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20 Cards in this Set
- Front
- Back
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what are 2 major types of microbial control and what is the difference between the two?
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Sterilization: Killing and/or removal of ALL microorganisms (including endospores)
Disinfection: REDUCTION in the number of organisms |
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T/F Sterilization removes endospores
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True
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T/F Antisepsis is used on skin and other tissues
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True
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What are two agents that affect cell wall
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Detergents
alcohol |
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What are agents that effect cell wall?
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Surfactants
*polar molecules that reduce surface tension by inserting into the membrane |
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What are some agents that affect proteins
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Heat
alcohols heavy metals (silver copper) |
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What are soma agents that affect nucleic acids?
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radiation
chemicals heat |
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when would you use an oven to sterilize?
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for items such as powders, oils and metals that will be damaged by moisture
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T/F Boiling is used to disinfect (bottles, utensils)
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FALSE
Used to SANITIZE |
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Does Autoclaving Sterilize?
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YES
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This process kills many pathogens and reduces the number or thermoresistant organisms allowing a longer shelf life
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Pasteurization
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What are three methods of pasteruization?
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Batch
Flash Ulta-high Temp |
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This form of radiation will NOT penetrate paper/clothing
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Non-ionizinf radiation
ex. UV |
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This form of radiation is an alternative to chlorination of drinking water
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Non-ionizing UV Radiation
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How can fluids that connot be subjected to heat such as serum and vaccines be sterilized
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Filtration
HEPA filters |
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These agents are more often used for antisepsis, disinfection, and food preservation than for sterilization
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Chemical control
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T/F: iodine is often used as an ANTISEPTIC
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True
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Alcohols must be used at concentrations of ___-___%
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50-95%
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T/F Hydrogen Peroxide is Bactericidal, virucidal, fungicidal, and sporicidal (in higher concentrations)
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TRUE
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T/F Spores are highly resistant to killing
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True
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