Diversity and Distribution of Commensal Fecal Escherichia coli Bacteria in Beef Cattle Administered Selected Subtherapeutic Antimicrobials in a Feedlot Setting

Ranjana Sharma, Krysty Munns, Trevor Alexander, Toby Entz, Parasto Mirzaagha, L. Jay Yanke, Michael Mulvey, Edward Topp and Tim McAllister

Applied and Environmental Microbiology 74 ( 20 ): 6178 - 6186 , 2008