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Microorganisms and Disease

Microorganisms and Disease
The agent responsible for causing mad cow disease is thought to be a

fungus
protozoan
virus
prion

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Microorganisms and Disease
Immunization with which of the following toxoid induces high titer serum antibody, but does not protect from the corresponding disease?

Tetanus
Botulism
Shigellosis
Diphtheria

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Microorganisms and Disease
Which is not a major defense mechanism in the stomach?

Dense normal flora
Low pH
All of these
Proteolytic enzymes

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Microorganisms and Disease
Which of these cytokines is also known under the name cachectin?

Interleukin 2
Interferon gamma
None of these
Tumor necrosis factor (TNF)

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Microorganisms and Disease
Mucus helps in protecting against pathogens by

blocking access and attachment of pathogens to mucosal surfaces
sequestering Iron
lowering the pH
facilitating the growth of normal flora

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Microorganisms and Disease
Lactoferrin helps to protect against pathogens by

lowering the pH
sequestering Iron
facilitating the growth of normal flora
blocking sebum production

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