Publication Date:
1998-09-11
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diez-Gonzalez, F -- Callaway, T R -- Kizoulis, M G -- Russell, J B -- New York, N.Y. -- Science. 1998 Sep 11;281(5383):1666-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biological Sciences, Section of Microbiology, Cornell University and Agricultural Research Service, U.S. Department of Agriculture, Ithaca, NY 14853-8101, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9733511" target="_blank"〉PubMed〈/a〉
Keywords:
*Animal Feed
;
Animal Husbandry
;
Animals
;
Bacteria, Anaerobic/growth & development
;
Cattle/*microbiology
;
Colon/chemistry/*microbiology
;
Colony Count, Microbial
;
Culture Media
;
Diet
;
*Edible Grain
;
Escherichia coli/*growth & development
;
Fatty Acids, Volatile/analysis
;
Hydrogen-Ion Concentration
;
Lactic Acid/analysis
;
*Poaceae
;
Random Allocation
;
Rumen/chemistry/microbiology
;
Succinates/analysis
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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