Effects of Ceftiofur and Chlortetracycline Treatment Strategies on Antimicrobial Susceptibility and on tet(A), tet(B), and blaCMY-2 Resistance Genes among E. coli Isolated from the Feces of Feedlot Cattle

A randomized controlled field trial was conducted to evaluate the effects of two sets of treatment strategies on ceftiofur and tetracycline resistance in feedlot cattle. The strategies consisted of ceftiofur crystalline-free acid (CCFA) administered to either one or all of the steers within a pen, f...

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Veröffentlicht in:	PloS one 2013-11, Vol.8 (11), p.e80575
Hauptverfasser:	Kanwar, Neena, Scott, H. Morgan, Norby, Bo, Loneragan, Guy H., Vinasco, Javier, McGowan, Matthew, Cottell, Jennifer L., Chengappa, Muckatira M., Bai, Jianfa, Boerlin, Patrick
Format:	Artikel
Sprache:	eng
Schlagworte:	Antibiotics Antiinfectives and antibacterials Antimicrobial agents Bacteria Bovidae Brachyspira Cattle Chemotherapy Chlortetracycline Dilution Drug resistance E coli Enterococcus faecium Escherichia coli Factorial design Factory farming Farms Feeding Feedlots Feeds Food Genes Housing Multidrug resistance Pens Public health Studies Survival analysis Veterinary colleges Veterinary medicine
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