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Microbial Control Defintions
Terms in this set (17)
a process that removes or destroys all life forms.
Sterile = free from life
Complete killing of all organisms, including spores & viruses
a process that usually kills pathogenic microbes, usually on inanimate (nonliving) objects. Only disease causing organisms, some spores. Control directed at destroying harmful microorganisms. use disinfectants
a chemical or physical agent that kills pathogens, usually on inanimate objects. Disinfectants usually do not sterilize but may be sporicidal.
the inhibition of growth of microorganisms on living tissues. Use antiseptic agents. When living tissue is disinfected.
a chemical agent that inhibits the growth of microbes, usually on living tissues.
a process of preventing putrefaction (rotting) or contamination. - Aspetic technique.
The absence of significant contamination. Used in surgery
one that causes fairly prompt death (irreversible damage). - Bactericide, fungicide, virucide, germicide, microbiocide
one that causes inhibition of growth (reversible damage). - Bacteriostatic agent, fungistatic agent
a process that kills or removes 99.9% of growing bacterial from an object, usually eating utensils, dishes, etc. Intended to lower microbal counts to safe public health levels & minimize the chances of disease transmission from one person to another. Accomplished by high temp water or chemical. Doesn't do anything to things not growing, don't work on spores
a process in which both living pathogens & other toxic products are removed
careful tissue cleansing with an antiseptic. It may reduce the total bacterial population a thousand fold. Replaces the term skin disinfection. Ex. when you swab the skin before an injection. Mechanical removal. Removes microbes & dirt.
Log death curve
a graphic representation of the death of a specific population number per interval of disinfection/sterilization time.
Microbial load (bioburden)
the number of microbes in an object to be treated.
Don't know in the real world, but do in a lab. Good for testing a disinfectant
Thermal death point
the temperature at which a given suspension of bacteria are killed in 10mins
Lowest possible temp
Thermal death time
the shortest period of time required to kill a suspension of bacteria at a specific temperature under specific conditions
Decimal Reduction time (DRT)
the time required for 90% of microbes to be killed
Important because bacteria are never all killed at same time need to remain in contact for greatest amount of time needed.
Temperature Coefficient (Q10)
the effect of a 10 degree rise in temperature on the killing rate.
Hotter temps work better than cold
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