ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
KF Streptococcus media were examined as to suitability for isolation and enumeration of enterocoeei from foods. Recovery of Streptococcus faecalis, Streptococcus faecalis var. zymogenes, Streptococcus faecalis var. liquefaciens, and Streptococcus durans was excellent with either a pour-plate technique or the liquid medium in an MPN technique. Streptococcus bovis, Streptococcus equinus, and Streptococcus mitis can be isolated with these media, but low recovery levels are obtained in the broth. Food constituents in concentrations as high as one part in five do not appear to affect the specificity of these media. The development of red colonies in the agar medium is indicative of the presence of S. faecalis or one of its varieties. The development of pink colonies in the medium or turbidity in the broth requires isolation and further study to determine the presence of enterocoeci.The commercially available dehydrated media appear to give excellent results, comparable to those obtained with batches compounded in the laboratory; however, there is some indication that extended storage of the dehydrated form may lead to deterioration.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1963.tb00244.x
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