Abstract

Coagulase-negative staphylococci (CNS) are often associated with bovine mastitis. Knowledge about the relative importance of specific CNS species in different types of mastitis, and differences in antimicrobial resistance among CNS species is, however, scarce. Therefore, the aims of this study were to compare prevalence and antimicrobial susceptibility of CNS species in clinical and subclinical mastitis using material from two national surveys. Overall, Staphylococcus chromogenes and Staphylococcus epidermidis were the most common CNS species found followed by Staphylococcus simulans and Staphylococcus haemolyticus. S. epidermidis was significantly more prevalent in subclinical than in clinical mastitis, and a similar trend was observed for Staphylococcus saprophyticus, while Staphylococcus hyicus was significantly more common in clinical mastitis. The prevalence of beta-lactamase producing isolates varied markedly between CNS species, and was significantly higher in S. epidermidis and S. haemolyticus (similar to 40%), than in S. simulans and S. chromogenes where none or a few of the isolates produced beta-lactamase. Resistance to more than one antimicrobial substance occurred in 9% and 7% of the clinical and subclinical isolates, respectively. In conclusion, the distribution of CNS species differed between clinical and subclinical mastitis indicating inter-species variation of pathogenicity and epidemiology. Overall, the prevalence of antimicrobial resistance was low, but some variation between CNS species was observed. (C) 2011 Elsevier B.V. All rights reserved.

Keywords

Bovine mastitis; CNS species; Antimicrobial susceptibility

Published in

Veterinary Microbiology
2011, Volume: 152, number: 1-2, pages: 112-116
Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Persson Waller, Karin

  • Department of Clinical Sciences, Swedish University of Agricultural Sciences
    

Associated SLU-program

AMR: Bacteria


Sustainable Development Goals

SDG3 Ensure healthy lives and promote well-being for all at all ages


UKÄ Subject classification

Animal and Dairy Science
Veterinary Science


Publication identifier

DOI: https://doi.org/10.1016/j.vetmic.2011.04.006

Permanent link to this page (URI)

https://res.slu.se/id/publ/58587