Topic 13 Chp13_HostMicrobeP

Topic 13 Chp13_HostMicrobeP - Chapter 13 Microbe-Human...

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Unformatted text preview: Chapter 13 Microbe-Human Interactions Contact with Microbe through Portal of Entry Each portal is defended by nonspecific and specific host defenses Natural Portals of Entry [Pathogen has evolved w/ natural portals] Inhalation [respiratory tract] Ingestion [alimentary tract] Sexual contact [genitourinary tract] Wounds [skin] Insect bites [skin] Manmade portals of entry Parenteral exposure- Surgery- Hypodermic needles - Catheters Tissue transplant- Blood - Solid organ Cosmetic choices- Body piercing- Tattoos Outcome of Host-Microbe Encounter = Balancing act Host defenses hold microbes growth in check. Microbe successfully evades host defenses; its growth damages host. Microbe + Human = Symbiotic relationships Normal (resident) microflora Commensalism Mutualism Pathogens Parasitism- microbe benefits- animal harmed- animal (i.e., human) becomes diseased Will microbial exposure result in disease?...
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Topic 13 Chp13_HostMicrobeP - Chapter 13 Microbe-Human...

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