Abstract

DURING the course of an ecological survey of the faecal streptococci, the need has arisen for a medium which is more highly selective for Streptococcus faecalis than media devised for the enumeration of enterococci in general. A number of workers1–4 have indicated that Strep. faecalis is the predominant streptococcus (Lancefield group D) of the gut of man, and that this species is relatively rare in the gut of animals. Hence a specific means of demonstrating this organism would be of some value to sanitarians as a means of assessing human faecal pollution, at least in certain climatic regions5.

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