A new selective medium (membrane‐bovis agar) for the detection and enumeration of Streptococcus bovis is described. It has been successfully used to quantify this organism in polluted waters, sewage and faeces of humans and farm animals. This medium is based on the ability of Strep. bovis to utilize ammonium sulphate as its sole source of nitrogen. Streptococcus faecalis, Strep. faecium, Strep. equinus, Strep. salivarius. Strep. mitis and other bacteria commonly found in water, sewage and faeces are completely inhibited. Streptococcus bovis appear to be the predominant faecal streptococci in the faeces of farm animals and absent in the faeces of humans. A total of 541 characteristic colonies (on m‐BA), isolated from various sources were identified to species level. Over 97% proved to be Strep. bovis. Therefore, routine confirmatory tests on colonies growing on this medium would appear to be unnecessary.
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Oragui et al. (1981) studied this question.
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