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Prevalence of Escherichia coli O157 in cattle feeds in Midwestern feedlots
(American Society for Microbiology, 2003-09)
Comparisons of enrichment methods (with or without antibiotics and with or without a preenrichment step) using gram-negative (GN) broth or tryptic soy broth (TSB) were conducted with feeds inoculated with Escherichia coli ...