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Journal of Dairy Science Vol. 36 No. 1 1-6
© 1953 by American Dairy Science Association ®
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A Plating Medium for the Isolation and Enumeration of Enterococci

George W. Reinbold, Marianne Swern and Ralph V. Hussong

Kraft Foods Company, Research Laboratories, Glenview, Illinois

ABSTRACT

A selective plating medium for the isolation and identification of the enterococcus group of streptococci has been developed. The method is based upon the ability of the enterococci to utilize sodium citrate as an available carbon source, to convert ditetrazolium chloride to a blue diformazan and to grow in the presence of 0.01 per cent sodium azide.

Results are presented which show that the selective plating medium can be used to isolate and estimate the numbers of enterococci in raw milk.






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Copyright © 1953 by the American Dairy Science Association ®.