3.A. Antibiotic resistance genes (ARGs) - Prevalence in dairy manure
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ANTIMICROBIAL RESISTANCE AND DAIRY MANURE SYSTEMS
Oliver, Jason; Gooch, Curt
More than 60 different ARGs have been found in cattle manure; tetracycline resistance genes may be the most common. A USDA-ARS study that sequenced the genome (See Fact Sheet 3.B.) of 160 antibiotic resistant E. coli and the entire fecal microbial community from 28 adult dairy cows, veal calves, and pre-weaned calves found that 61% of all identified ARGs encoded resistance to tetracycline, 20% encoded resistance to aminoglycosides, 8% to macrolides, 3% to β-lactams, 0.8% to sulfonamides, and 0.6% to trimethoprim.
This material is based upon work that is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award number 2016-68003-24601. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.
dairy; antimicrobial; resistance; genes