http://en.wikipedia.org/wiki/Escherichia_coli
In fact, from the evolutionary point of view, the members of genus Shigella (S. dysenteriae, S. flexneri, S. boydii, S. sonnei) should be classified as E. coli strains, a phenomenon termed taxa in disguise.Similarly, other strains of E. coli (e.g. the K-12 strain commonly used in recombinant DNA work) are sufficiently different that they would merit reclassification.
In fact, from the evolutionary point of view, the members of genus Shigella (S. dysenteriae, S. flexneri, S. boydii, S. sonnei) should be classified as E. coli strains, a phenomenon termed taxa in disguise.Similarly, other strains of E. coli (e.g. the K-12 strain commonly used in recombinant DNA work) are sufficiently different that they would merit reclassification.
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