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Micro
Week 2e - Sterilization and Disinfection
10
Accounting
Pre-School
03/06/2013

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Cards

Term
What is the difference between sterilization and disinfection?
Definition
-Sterilization is *complete killing, even of spores
-Disinfection is killing that fails to meet the same standards
Term
How does a graph of killing look?
Definition
-It is exponential
Term
What is autoclaving?
Definition
-Steam under pressure (at about 121°C and 15psi)
Term
How hot and long for dry head for sterilization? How long for boiling?
Definition
-Need 160°C for two damn hours
-Boiling is not a valid method; doesn't kill spores
Term
What can we use for heat labile materials?
Definition
-Can use ethylene oxide gas at about 50-60°C
-Can also use alkylating agents such as the aldehydes (glutaraldehyde and formaldehyde)
Term
What do we use for high, intermediate, and low-level disinfection?
Definition
-High; chlorine compounds, glutaraldehyde
-Mid; alcohol, phenolic compounds
-Low; quaternary ammonium compounds
Term
What are some physical means?
Definition
-We can use stuff like UV light, radiation, and filtration
Term
What are the heavy metals we can use in one form or another?
Definition
-Mercury, silver, and arsenic
-Mercury as phynylmercury salts for pseudomonads in cosmetics
-Silver nitrate for burn victims
Term
What are halogens and examples?
Definition
-They are **oxidizing agents;
-Chlorine; for water
-Iodine; causes hypersensitivity sometimes (and staining)
-Iodophors (iodine & detergents); less hypersensitivity
-Hydrogen peroxide; kills bac at low and spores at high concentrations
Term
What is plasma gas?
Definition
-Vaporized hydrogen peroxide
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