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17 Cards in this Set
- Front
- Back
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normal microbiota protect hosts by |
- occupying places that pathogens might occupy - producing acids and bacteriacidins |
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transients |
influenced by hygiene |
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residents |
stable and predictable |
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true pathogens |
capable of causing disease in healthy persons with normal immune defenses |
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opportunistic pathogens |
cause disease only when hosts defenses are compromised or when they grow in a part of the body thats not natural to them |
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portal route of entry |
the route a pathogen takes to enter a host |
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adhesion |
binding between specific molecules on host and pathogens |
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zoonosis |
lyme disease is spread through deer tick, animals are reservoirs |
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vector transmission |
lyme, malaria, sleeping sickness |
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vector |
live animal that transmits from one host to another |
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direct transmission |
through bite, saliva, scratch, infected animal |
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biological vectors |
actively participate in pathogens life cycle |
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mechanical vector |
transports microbe without being infected |
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vehicle |
transmission by an inanimate shared reservoir (food air water) |
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indirect contact |
passes from infected host to intermediate conveyor and than to another host |
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nosocomial infections |
diseases that are acquired or developed during a hospital day |
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epidemiology |
study of the frequency and distribution of disease |
