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Microbial associations

Microbial associations. Symbiotic – organisms live in close nutritional relationships; required by one or both members Mutualism – obligatory, dependent; both members benefit Commensalism – commensal member benefits, other member not harmed

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Microbial associations

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  1. Microbial associations • Symbiotic – organisms live in close nutritional relationships; required by one or both members • Mutualism – obligatory, dependent; both members benefit • Commensalism – commensal member benefits, other member not harmed • Parasitism – parasite is dependent and benefits; host is harmed

  2. Microbial associations • Non-symbiotic – organisms are free-living; relationships not required for survival • Synergism – members cooperate and share nutrients • Antagonism – some member are inhibited or destroyed by others

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