Science. 1998 Sep 11;281(5383):1666-8.

Grain feeding and the dissemination of acid-resistant Escherichia coli from cattle.

Diez-Gonzalez F, Callaway TR, Kizoulis MG, Russell JB.

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Division of Biological Sciences, Section of Microbiology, Cornell University and Agricultural Research Service, U.S. Department of Agriculture, Ithaca, NY 14853-8101, USA.

Abstract

The gastric stomach of humans is a barrier to food-borne pathogens, but Escherichia coli can survive at pH 2.0 if it is grown under mildly acidic conditions. Cattle are a natural reservoir for pathogenic E. coli, and cattle fed mostly grain had lower colonic pH and more acid-resistant E. coli than cattle fed only hay. On the basis of numbers and survival after acid shock, cattle that were fed grain had 10(6)-fold more acid-resistant E. coli than cattle fed hay, but a brief period of hay feeding decreased the acid-resistant count substantially.

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Cattle, hay and E. coli. [Science. 1999]
Cattle, hay and E. coli.Hancock DD, Besser TE, Gill C, Bohach CH. Science. 1999 Apr 2; 284(5411):51-3.
Cattle diet linked to bacterial growth. [Science. 1998]
Cattle diet linked to bacterial growth.Couzin J. Science. 1998 Sep 11; 281(5383):1578-9.

PMID:: 9733511; [PubMed - indexed for MEDLINE]

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