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causes of disease (prions (cause transmissible spongiform encephalopathies…
causes of disease
prions
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simple proteins, smaller than viruses
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viruses
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contain only one species nucleic acid, either DNA or RNA
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pathogenesis
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damage to the host
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indirect
release of toxin, irritant enzyme, induction of host immune response
host
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predisposing factors, also cause of disease
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