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Full-Text Articles in Animal Sciences
Metaphylactic Antimicrobial Effects On Occurrences Of Antimicrobial Resistance In Salmonella Enterica, Escherichia Coli And Enterococcus Spp. Measured Longitudinally From Feedlot Arrival To Harvest In High-Risk Beef Cattle, Nathan S. Long, James E. Wells, Elaine D. Berry, Jerrad F. Legako, Dale R. Woerner, Guy H. Loneragan, Paul R. Broadway, Jeff A. Carroll, Nicole C. Burdick Sanchez, Samodha C. Fernando, Carley M. Bacon, Cory L. Helmuth, Taylor M. Smock, Jeff L. Manahan, Ashley A. Hoffman, Kristin E. Hales
Metaphylactic Antimicrobial Effects On Occurrences Of Antimicrobial Resistance In Salmonella Enterica, Escherichia Coli And Enterococcus Spp. Measured Longitudinally From Feedlot Arrival To Harvest In High-Risk Beef Cattle, Nathan S. Long, James E. Wells, Elaine D. Berry, Jerrad F. Legako, Dale R. Woerner, Guy H. Loneragan, Paul R. Broadway, Jeff A. Carroll, Nicole C. Burdick Sanchez, Samodha C. Fernando, Carley M. Bacon, Cory L. Helmuth, Taylor M. Smock, Jeff L. Manahan, Ashley A. Hoffman, Kristin E. Hales
Department of Animal Science: Faculty Publications
Aims: Our objective was to determine how injectable antimicrobials affected populations of Salmonella enterica, Escherichia coli and Enterococcus spp. in feedlot cattle.
Methods and Results: Two arrival date blocks of high-risk crossbred beef cattle (n = 249; mean BW = 244 kg) were randomly assigned one of four antimicrobial treatments administered on day 0: sterile saline control (CON), tulathromycin (TUL), ceftiofur (CEF) or florfenicol (FLR). Faecal samples were collected on days 0, 28, 56, 112, 182 and study end (day 252 for block 1 and day 242 for block 2). Hide swabs and subiliac …