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Physical and Chemical Agents

Physical and Chemical Agents
A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues.

disinfectant
bacteriostatic agent
antiseptic
sanitizer

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Physical and Chemical Agents
Which of the following is bactericidal?

Membrane filtration
Freeze-drying
Deep freezing
Ionizing radiation

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

Phenol
Hexachlorophene
Merthiolate
Cetylpyridinium chloride

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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?

5
10
50
1

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Physical and Chemical Agents
Which of the following substances can sterilize?

Alcohol
Cetylpyridinium chloride
Chlorine
Ethylene oxide

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Physical and Chemical Agents
Which of the following does not kill endospores?

Pasteurization
Incineration
Autoclave
Hot air sterilization

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