Week 4 Concepts:Controlling Microbial Growth
Which of the following microbial forms has the highest resistance to physical and chemical controls? Bacterial endospores
The method of removing vegetative microbial life forms and debris to reduce contamination to safe levels is termed .
Sanitization Sterilization is achieved by steam autoclave. HEPA filters are used to remove microbes from air.
The alcohol wipe used on a patient's skin before an injection is an example of antisepsis.
Chlorine is a halogen used in gaseous and liquid form for large scale disinfection of drinking water and sewage.
The sterilizing gas used in chemiclaves is ethylene oxide . Sterilization – destruction of all microbial life including endospores.
Disinfection – destruction of most microbial life, but often does not kill spore-forming bacteria.
Antisepsis (also called degermation or degerming ) – disinfection on a
living surface, such as patient’s arm.
Decontamination (also called sanitization) – mechanical removal of most microbes from an animate or inanimate surface and can be accomplished with hot water, steam, or chemicals. Bacteriocide/Bacteriocidal – kills bacteria.