PMID: 12784967Jun 6, 2003Paper

Antimicrobial resistance of bacteria isolated from dairy cow milk samples submitted for bacterial culture: 8,905 samples (1994-2001)

Journal of the American Veterinary Medical Association
Jill A Makovec, Pamela L Ruegg

Abstract

To determine whether antimicrobial resistance patterns of major mastitis pathogens isolated from milk samples from dairy cows have changed over time. Retrospective study. 8905 bacterial isolates obtained from milk samples submitted to the Wisconsin Veterinary Diagnostic Laboratory between January 1994 and June 2001. Antimicrobial susceptibility was determined by means of the Kirby-Bauer disk diffusion method. Logistic regression was used to determine whether percentages of isolates resistant to various antimicrobials changed over time. For the gram-positive mastitis pathogens, percentages of isolates resistant to various flactam antimicrobials did not increase over the course of the study. Percentage of Staphylococcus aureus isolates resistant to penicillin decreased from 49 to 30%; percentage of Streptococcus isolates resistant to penicillin decreased from 6 to 1%. Percentage of isolates resistant to erythromycin increased for S aureus, Escherichia coli, Enterobacter spp, Enterococcus spp, and Pasteurella spp. Percentage of isolates resistant to lincomycin increased for S aureus and Staphylococcus spp. Percentage of coagulase-negative Staphylococcus isolates resistant to pirlimycin increased from 6 to 19%. For several pathogen...Continue Reading

References

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Citations

Oct 11, 2011·Journal of Mammary Gland Biology and Neoplasia·Mark A Holmes, Ruth N Zadoks
Apr 5, 2012·Foodborne Pathogens and Disease·Ginger M Shipp, James S Dickson
Jun 19, 2010·Transboundary and Emerging Diseases·D ShiX Fan
Feb 9, 2011·Acta Veterinaria Scandinavica·Piret KalmusKalle Kask
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Oct 12, 2007·Expert Opinion on Pharmacotherapy·David Guay
Jul 24, 2012·Journal of Dairy Science·V SainiH W Barkema
Jul 4, 2016·Journal of Dairy Science·Olivier SamsonRuth Zadoks
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Nov 19, 2005·Preventive Veterinary Medicine·William M Sischo
Mar 21, 2007·Journal of Dairy Science·R G M Olde RiekerinkH Stryhn
Apr 17, 2012·Veterinary Microbiology·T MørkT Tollersrud
Oct 25, 2016·Veterinary Microbiology·Conny TurniPat Blackall
Aug 25, 2011·Research in Veterinary Science·Acácia Orieth EliasHelio Langoni

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