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Physical and Chemical Agents

Physical and Chemical Agents
Which disinfectant was the most effective against Salmonella"?

Hexachlorophene
Phenol
Merthiolate
Cetylpyridinium chloride

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Physical and Chemical Agents
Complete destruction of the microorganisms is commonly known as

sterilization
antisepsis
disinfection
none of these

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Physical and Chemical Agents
If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound?

10
50
1
5

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Physical and Chemical Agents
Which of the following has most heat resistant spores?

Clostridium histolyticum
Clostridium perfringens
Bacillus stearothermophilus
Bacillus cereus

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Physical and Chemical Agents
Which of the following disinfectants act by disrupting microbial membranes?

Heavy metals
Cationic detergents
Halogens
Aldehydes

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Physical and Chemical Agents
Ethylene oxide is used to destroy or kill which of the following microbes?

Bacteria
Spores
All of these
Fungi

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