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22 Cards in this Set
- Front
- Back
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when did the scientific control of microbial growth begin
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only about 100 years ago
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pasteur's work on microorganisms led scientists to beleive that microbes were
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a possible cause of disease
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ignaz semmelweis and joseph lister used pasteur's work to develop
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some of the first microbial control practices for medical procedures
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the practices of semmelweis and lister included
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hand washing and microbekilling chloride of lime and use of aseptic surgery
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aseptic surgery prevented
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microbial contamination of surgical wounds
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nosocomial infections
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hospital-acquired infections
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what was the cause of death in at least 10% of surgical cases
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hospital-acquired infections
nosocomial infections |
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deaths of ______ were has high as 25%
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delivering mothers
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the removal or destruction of all forms of microbial life
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sterilization
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what is the most common method used for killing microbes
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heating
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what is the most reisistant forms of microbes
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endospores
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what is a sterilizing agent called
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a sterilant
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sterilization by removal of microbes from liquids or gases can be done by
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filtration
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food is subjected only to enough heat
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to destroy the endospores of Clostridium botulinum
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what can C. botulinum produuce
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a deadly toxin
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the limited heat treatment to canned goods is called
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commercial sterilization
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the endospores of a number of thermophile bacteria, capable of causing food spoilage but not human disease, are considerably
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ore resistant to heat than C. botulinum
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if the endospores are present
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they will survive
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endospores will not grow at
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normal food storage temperatures
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if canned foods in a supermarket were incubated at temperatures in the growth range of these thermophiles (above 45*C)
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sigificant food spoilage would occur
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when is complete sterilization not required
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when a few microbes enter a surgical wound, a drinking glass/fok in a restaurant requires only enough microbial growth to prevent the transission of possibly pathogenic microbes from one person to another
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control directed at destroying harmful microorganisms is called
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disinfection
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