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6 Cards in this Set
- Front
- Back
What is pathogenicity?
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Ability of an organism to infect a susceptible host genotype and cause disease
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What is virulence?
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The degree of disease caused by a pathogen genotype under appropriate conditions. Akin to aggressiveness.
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What makes a pathogen "Community acquired?"
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bacteria were acquired outside of the hospital setting
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What are Nosocomial pathogens?
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Hospital acquired microbes
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What are Koch’s Postulates?
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FIRST, isolate the suspected agent from a disease victim.
SECOND, grow the agent in pure culture. THIRD, infect a healthy host and show that the organism produces the CLASSICAL CLINICAL DISEASE. FOURTH, ISOLATE the "same" organism from the new victim. |
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What are two exceptions to Koch’s Postulates?
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Postulates imply virulence is all due to bacteria
- host susceptibility is at least as important Postulates emphasize the ability to get a pure culture - some pathogens cannot be cultured. |