Comparison of antimicrobial susceptibility of Staphylococcus aureus isolated from bulk tank milk in organic and conventional dairy herds in the midwestern United States and Denmark

Journal of Food Protection
K SatoJohn B Kaneene

Abstract

An observational study was conducted to compare the antimicrobial susceptibility patterns of Staphylococcus aureus isolated from bulk tank milk in organic and conventional dairy farms in Wisconsin, United States, and southern Jutland, Denmark. Bulk tank milk samples and data regarding management and production were collected from 30 organic and 30 conventional dairy farms in Wisconsin and 20 organic and 20 conventional dairy farms in Denmark. S. aureus isolates were tested for resistance against 15 antimicrobial agents by semiautomatic microbroth dilution methods in each country. Of the 118 bulk tank milk samples in Wisconsin, 71 samples (60%) yielded at least one S. aureus isolate, and a total of 331 isolates were collected. Of the 40 bulk tank milk samples from Denmark, 27 samples (55%) yielded at least one S. aureus isolate, and a total of 152 isolates were collected. Significant differences between organic and conventional dairies were detected only to ciprofloxacin in Wisconsin and avilamycin in Denmark. Significant differences (P < 0.05) between the two countries were detected in nine antimicrobials. Denmark had a higher probability of having reduced susceptibility to ciprofloxacin and streptomycin (P = 0.015 and 0.003, r...Continue Reading

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Citations

Sep 30, 2008·Journal of Animal Science·P L Ruegg
Aug 13, 2013·Journal of Dairy Science·K A E MullenK L Anderson
Mar 16, 2017·The Journal of Dairy Research·Eleni MalissiovaChristos Hadjichristodoulou
Oct 19, 2005·Journal of Dairy Science·H J JørgensenL M Rørvik
Mar 16, 2006·Journal of Dairy Science·H D Goff, M W Griffiths
Jan 13, 2006·Critical Reviews in Food Science and Nutrition·Faidon MagkosAntonis Zampelas
Feb 3, 2018·Foodborne Pathogens and Disease·Reta Duguma AbdiOudessa Kerro Dego
Oct 14, 2008·Foodborne Pathogens and Disease·Megan E JacobT G Nagaraja
May 19, 2021·Journal of Dairy Science·S McDougallD Dymock

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