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Define the following microbe-host relationships: commensalism, symbiosis, mutualism, ammensalism and latency.
- Symbiosis: stable relationship.
- Commensalism: 1 benefits and the other is unaffected.
- Mutualism: both benefit ( in the mouth, bacteria filled a niche so worse bacteria can’t
- get in there).
- Ammensalism: 1 injured, other one is unaffected (2 types of bugs in mouth: 1 bacteria produce Antibiotic and 1 is harm).
- Latency: infection that dormant within the host (TB lives inside macrophage laying dormant, HIV has latent phase) You can still infect others when you are in latent phase.
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Define the following classifications of microbe host interactions: parasite, strict and opportunistic pathogen, infection, endogenous disease, exogenous disease, colonization, normal flora and disease.
- Parasite: host is damage insymbiosis gone bad.
- Pathogen: parasite that can and
- does damage the host and cause disease.
- Infection: a process where a pathogen/parasite is causing disease. Comes from 1 of 2 sources: exogenous source caused by microbe from outside your own body but not all disease is exogenous or endogenous disease caused by your own flora or a latent infection (shingles)
- Opportunistic pathogen: One that will cause disease in the right time and place. Any bacteria can cause disease if its in the right place at the right time.
- Strict pathogen: not flora EVER. (ex. M.
- tuberculusosis)
- Endogenous disease: diseas is produced by organisms in the person's own microbial flor that spread to inappropriate body sites
- exogenous disease: diseases arise when a person is exposed to organisms from external sources
- colonization: long term symbiotic disease
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Identify areas of the human body that should be free of microbes.
Blood, brain, organs, bladder, urine
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Describe the flora of the skin and the defenses that prevent infections.
Skin: keratonized, slightly acidic, normal flora
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Describe the flora of the eye as well as the defenses found there.
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