Abstract
<i>Staphylococcus delphini</i>and Methicillin-Resistant<i>S. pseudintermedius</i>in Horses, Canada
Highlights
Methicillin-resistant or unusual staphylococci that are isolated at the Ontario Veterinary College Health Sciences Centre by the University of Guelph Animal Health Laboratory (AHL) routinely undergo further characterization
Infection with methicillin-resistant S. pseudintermedius (MRSP) might be overlooked in horses; misidentification as S. aureus is possible if laboratories assume that coagulase-positive staphylococci from horses are S. aureus, and misidentification as methicillin susceptible is possible because the use of cefoxitin susceptibility and S. aureus breakpoints is ineffective for determination of methicillin resistance in S. pseudintermedius (10)
Given the rapid expansion of S. pseudintermedius infections among dogs, the potential for zoonotic transmission, and the highly resistant nature of this pathogen, ongoing surveillance is indicated in the equine population
Summary
Staphylococcus delphini and Methicillin-Resistant S. pseudintermedius in Horses, Canada S. pseudintermedius and S. delphini, members of the S. intermedius group (SIG), cause infections in some companion animals and equids (2), can be multidrug resistant, and could be a concern in horses. Methicillin-resistant or unusual staphylococci that are isolated at the Ontario Veterinary College Health Sciences Centre by the University of Guelph Animal Health Laboratory (AHL) routinely undergo further characterization.
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