ENTEROCOCCI AS AN INDEX OF FECAL CONTAMINATION IN EGG PRODUCTS
作者:
Helen J. Brown,
N. E. Gibbons,
期刊:
Canadian Journal of Research
(NRC Available online 1950)
卷期:
Volume 28f,
issue 5
页码: 107-117
ISSN:1923-4287
年代: 1950
DOI:10.1139/cjr50f-009
出版商: NRC Research Press
数据来源: NRC
摘要:
Enterococci were present in all samples of liquid and frozen egg products examined. They survived spray drying and storage in egg powder better than the coliforms andEscherichia coliand are therefore considered a better index of fecal contamination. There was no relation between the occurrence ofSalmonellaorganisms and the number of enterococci present.Streptococcus faecaliswas the species most commonly found. The addition of 0.5% yeast extract to SF medium reduced the number of false negatives and improved the sensitivity, although confirmation on agar was still necessary. Winter and Sandholzer's medium, with bromocresol purple as indicator, could be used without confirmation but was not as sensitive for products containing small numbers of enterococci.
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