http://en.wikipedia.org/wiki/Escherichia_coli
E. coli is frequently used as a model organism in microbiology studies. Cultivated strains (e.g. E. coli K12) are well-adapted to the laboratory environment, and, unlike wild type strains, have lost their ability to thrive in the intestine. Many lab strains lose their ability to form biofilms.These features protect wild type strains from antibodies and other chemical attacks, but require a large expenditure of energy and material resources.
E. coli is frequently used as a model organism in microbiology studies. Cultivated strains (e.g. E. coli K12) are well-adapted to the laboratory environment, and, unlike wild type strains, have lost their ability to thrive in the intestine. Many lab strains lose their ability to form biofilms.These features protect wild type strains from antibodies and other chemical attacks, but require a large expenditure of energy and material resources.
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