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Fecal Shedding in Cattle Inoculated with Escherichia coli O157:H7 and Fed Corn or Wheat Distillers' Dried Grain with Solubles

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Feeding corn dried distillers' grain with solubles (DDGS) has been linked to increased fecal shedding of Escherichia coli O157:H7 in cattle. A study was conducted to compare the impact of three diets containing (dry matter basis) 40% corn DDGS, 40% wheat DDGS, or 20% corn and 20% wheat mixed DDGS to a standard barley grain finishing diet on fecal shedding in cattle challenged with a 1010 CFU mixture of four nalidixic acid–resistant E. coli O157:H7 strains. Rectal grab samples (n = 544) were collected over 70 days and screened for E. coli O157:H7 by direct plating and immunomagnetic bead separation. Feeding diets containing DDGS had no effect (P > 0.05) on the intensity or duration of fecal shedding of E. coli O157:H7 compared with the standard barley grain finishing diet.

Document Type: Research Article


Affiliations: 1: Department of Biological Sciences, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta, Canada T1K 3M4 2: Agriculture and Agri-Food Canada, 5403 1st Avenue South, Lethbridge, Alberta, Canada T1J 4B1 3: Alberta Agriculture and Rural Development, 100, 5401 1st Avenue South, Lethbridge, Alberta, Canada T1J 4V6 4: Agriculture and Agri-Food Canada, 5403 1st Avenue South, Lethbridge, Alberta, Canada T1J 4B1.

Publication date: January 1, 2013

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