Minimum inhibitory concentrations for selected antimicrobial agents against organisms isolated from the mammary glands of dairy heifers in New Zealand and Denmark

Journal of Dairy Science
S A SalmonR J Yancey

Abstract

Minimum inhibitory concentrations were determined for selected antimicrobial agents against 872 bacteria isolated from intramammary infections in heifers in New Zealand (n = 401) and Denmark (n = 471). These values were reported in micrograms per milliliters. Antimicrobial agents tested against isolates from New Zealand were penicillin, cloxacillin, cephapirin, ceftiofur, novobiocin, enrofloxacin, erythromycin, and pirlimycin. The minimum inhibitory concentrations that inhibit 90% of the strains tested for these antimicrobial agents with Staphylococcus aureus were 4.0, 0.5, 0.5, 2.0, 1.0, 0.25, 0.5, and 1.0, respectively. The minimum inhibitory concentration values that inhibit 90% of the strains tested against the Staphylococcus spp. ranged from 0.5 to 1.0 for all antimicrobics. The minimum inhibitory concentrations against streptococci were < or = 0.06, 0.5, 0.13, 0.13, 4.0, 1.0, 0.13, and < or = 0.06, respectively. Antimicrobial agents tested against isolates from Denmark included penicillin, ampicillin, oxacillin, cephalothin, ceftiofur, penicillin plus novobiocin, erythromycin, and pirlimycin. Against S. aureus, the minimum inhibitory concentrations were 0.13, 0.5, 0.5, 0.5, 1.0, 0.25, 0.5, and 0.5, respectively. The minim...Continue Reading

References

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Citations

Oct 12, 2010·BMC Veterinary Research·Manfred KietzmannJacques Gossellin
Jul 18, 2002·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·J SchlegelováD Rysánek
Aug 26, 2004·Journal of Dairy Science·A PitkäläT Honkanen-Buzalski
Jul 24, 2012·Journal of Dairy Science·V SainiH W Barkema
May 7, 2005·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·G DenamielE Gentilini
May 7, 2010·Journal of Veterinary Pharmacology and Therapeutics·M F LucasN Mestorino
Jun 28, 2002·Journal of Dairy Science·R J ErskineD G White
Jul 27, 2001·Current Psychiatry Reports·D M Greenberg, J W Lee
Oct 12, 2007·Expert Opinion on Pharmacotherapy·David Guay
Apr 5, 2002·International Journal of Antimicrobial Agents·Véronique Guérin-FaubléeGérard Carret
Apr 21, 2006·The Veterinary Journal·M B MelchiorJ Fink-Gremmels

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