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E.coli the most familiar bacterium.It is a Coliform bacterium i.e. it lives in intestine of man.As it gets its food from human intestine it is parasitic and all parasites are heterotrophic , hence it is also heterotrophic. Autotrophic bacteria are mostly Cyanobacteria.E. coli is opertunistic pathogenic for human beings.

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13y ago

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