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controlling microbial growth
basic principles and methods of microbial control
11
Microbiology
02/19/2011

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Cards

Term
Pasteurization
Definition
Ex; milk and fruit juices--use of heat to destroy pathogens to reduce spoilage microbes, in food/beverages (not sterile) is not heated enough to alter taste or texture
Term
Degerming
Definition
Ex; handwashing--removal of microbes by mechanical means (e.g. vigorous hand scrubbing) on living tissue---chemicals play a secondary role to the mechanical removal of microbes
Term
Sterilization
Definition
Ex; preparation of microbiological culture media and canned food---typically achieved via steam under pressure, incineration, or ethylene oxide gas
Term
Disinfection/disinfectants
Definition
Ex; phenolics, alcohols, aldehydes, surfactants---destruction of most microbes and viruses on non-living tissue----term is used primarily in relation to pathogens
Term
Aseptic
Definition
Ex; preparation of surgical field; hand-washing; flame sterilization of laboratory equipment---refers to an environment or procedure free of pathogenic contaminants---scientist, laboratory technicians and health care workers routinely follow standardized aseptic techniques
Term
Sanitation
Definition
Ex; washing tablewear in scalding water in restaurants---removal of pathogens from inanimate objects in public places to meet public health standards---standards of sanitation vary among governmental jurisdictions
Term
Antisepsis/antiseptic
Definition
Ex iodine; alcohol---reduction in # of microbes and viruses, particularly potential pathogens, on living tissue---frequently disinfectants whose strength has been reduced to make them safer for living tissues
Term
Stasis/-static
Definition
Ex; refrigerator, bacteriostatic, fungistatic, virustatic---germastatic include some chemicals, refrigeration, and freezing---inhibition of, but not complete destruction of a type of microbe
Term
Cide/-cidal
Definition
Ex; bactericide, fungicide, germicide, virucide,---destruction of a type of microbe---germicides include ethyl oxide, propylene oxide, and aldehydes
Term
Microbial death rate
Definition
One technique for evaluating the efficacy of a antimicrobial agent, it is usually found to be constant over time for any particular microorganism under a particular set of conditions
Term
Protective features of microbes
Definition
Endospore formation (c. Tetani)
Cysts (protozoa)
Porins (pseudomonis)
Cell wall (myobacterium tuberculosis)
Active growth vs resting cells (ABT)