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. 1979 Sep;38(3):431–435. doi: 10.1128/aem.38.3.431-435.1979

Improved detection of coliforms and Escherichia coli in foods by a membrane filter method.

A N Sharpe, P I Peterkin, N Malik
PMCID: PMC243512  PMID: 394679

Abstract

Analytical procedures based on filtration of homogenates through membrane filters, and particularly hydrophobic grid-membrane filters (HGMF), offer definite improvements in the enumeration of Escherichia coli and coliforms in foods. Whereas the counted specimen in pour plates may not usually be greater than 0.1 g, up to 1.0 g of ground beef, green beans, potato, cod, strawberries, or grapes could be filtered and counted on HGMF. Greatly improved limit of detection, reduced interference by noncoliforms, and complete removal of growth inhibitors such as polyphenols were demonstrated for HGMF, using violet red bile and mFC agars. In addition, counting on HGMF eliminated a false-positive reaction caused by sucrose in ice cream.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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