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15 Cards in this Set
- Front
- Back
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Sterilization |
Removal and destruction of all microbes |
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Disinfection |
The destruction of all vegetative microbes |
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Contamination |
Refers to the presence of microbes |
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Contaminant |
A substance that: A) Does not belong period B) Does not belong at certain levels |
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Decontamination |
Removal of contaminants to any degree |
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Antiseptic |
Pathostatic agent used on a biological level to prevent damage |
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Microbial death |
The permanent loss of reproductive capability even under optimal growth conditions |
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Optimal growth conditions |
Nutrients, atmosphere, temperature correct |
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Factors which affect microbial death rate |
Microbe count Type of microbe Environment temperature and conditions Concentration of agent Type of agent Presence of solvents, organic matter, or inhibitors |
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Low resistance microbes |
Fungal spores Yeasts Enveloped viruses Protozoan trophozoites (vegetative bacteria) |
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Moderate resistance microbes |
Protozoan cysts Fungal sexual spores Naked viruses Some vegetative bacterial cells: E.g. Tuberculosis, S. aureus, pseudomonas |
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High resistance microbes |
Prions Endospores |
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Thermal death time (TDT) |
Shortest time require to kill a population of microorganisms at a specific temperature |
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Thermal death point |
Lowest temperature required to a kill a population of microorganisms in 10 minutes |
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Most common autoclave input |
12psi bar, 121C, 15-20 minutes |
