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Free Living
answer
Does not require a host; non-pathogenic
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Pathogenic
answer
Cause disease; require assocation with host
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Free-living microbes do not reside in or rely on _______
answer
a specific host
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Are free living microbes pathogenic or non pathogenic?
answer
Non-pathogenic
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Many free living microbes are saprophytes, what does this mean?
answer
Organic matter decomposer
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Why do we rely on free-living microbes?
answer
Many participate in biochemical cycles that we an our environment rely on
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Pathogen
answer
an organism that can cause disease
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Pathogenic
answer
Microbe able to cause disease
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Pathogenicity
answer
Microbes ability to cause disease
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If a microbe resides with a hose and causes harm to the host, what is it considered?
answer
pathonogenic
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Host-microbe interactions can be what two things?
answer
pathogenic or non-pathogenic
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Symbiosis
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To live together
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Symbiotic relationships: Mutualism
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both organisms benefit (Lactic acid bacteria in our GI tracts providing vitamins/ we provide the nutrients)
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Symbiotic relationships: Commensalism
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One organism benefits, the other is relatively unharmed (Like strepococcus spp. in our respiratory tracts)
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Symbiotic relationships: parasitism
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One organism benefits @ expense of other. (Like Chlamydia trachomatis obligate parasite causing the STI chlamydia)
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Opportunistic pathogens
answer
no-pathogenic microbes can become pathogenic when they are introduced to new area more suitable for growth (oppotunity)
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How many microbes are in and on our bodies (normal microbiota)
answer
Trillions of microbes
question
Example of opportunistic pathogen in humans
answer
Escherichia coli - normal microbiota in GI tract, when accidentally introduced to urinary tract can cause UTI
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