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. 1982 Jan;43(1):14–27. doi: 10.1128/aem.43.1.14-27.1982

Development of a two-step enrichment procedure for recovery of Yersinia enterocolitica from food.

D A Schiemann
PMCID: PMC241776  PMID: 7055371

Abstract

Two new enrichment media were formulated for the recovery of Yersinia enterocolitica from foods: (i) yeast extract-rose bengal broth for preenrichment at 4 or 10 degrees C; and (ii) bile-oxalate-sorbose broth, a selective enrichment incubated at 22 degrees C. Comparison of these media in a two-step enrichment procedure against cold enrichment and modified Rappaport broth showed improved and more rapid recovery of human strains of Y. enterocolitica from inoculated foods. The use of bile-oxalate-sorbose broth as a selective enrichment also improved the performance of cold enrichment with phosphate-buffered saline. Determination of the best enrichment system for recovery of Y. enterocolitica from samples of retail pork and fresh pork tongues depended on whether the criterion was the number of positive samples, the variety of different serotypes recovered, or the ability to recover the important human serotype O:3. A single enrichment system with the widest selectivity would include preenrichment at 4 degrees C with either phosphate-buffered saline for 14 days or yeast extract-rose bengal broth for 9 days followed by selective enrichment with bile-oxalate-sorbose broth at 22 degrees C for 5 days.

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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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