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The use of Escherichia coli as an indicator of fecal pollution and the significance of its presence in surface waters was reviewed. A minidefinition which identifies this organism at least 95 percent of the time was proposed. Membrane filtration and most probable number methods for the enumeration of E. coli were discussed.
bacteria, water, coliform bacteria, fecal pollution indicator, fecal coliform, enumeration techniques
Microbiologist, Marine Field Station of the Health Effects Research Laboratory, West Kingston, R. I.