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Volume 20, Number 3—March 2014

Staphylococcus delphini and Methicillin-Resistant S. pseudintermedius in Horses, Canada

Jason W. StullComments to Author , Durda Slavić, Joyce Rousseau, and J. Scott Weese
Author affiliations: University of Guelph, Guelph, Ontario, Canada

Main Article


Results of investigation of Staphylococcus delphini and S. pseudintermedius infection in horses, Canada*

Isolate ID or source
Animal age and status
Medical history
Sample source
Date sampled
Mixed infection?
Identification method†
MRSP-1 MRSP, dt11a 1 y, filly Sinusitis Frontal sinus surgery 2011 Aug Yes A
SD-1 S. delphini (group B) 8 y, mare Chronic otitis externa Ear canal swab 2011 Feb Yes B
SD-2 S. delphini (group B) 5 y, mare Streptococcus equi surveillance Nasopharyngeal wash 2011 Jun No B
SD-3 S. delphini (group A) 5 y, mare S. equi surveillance Nasopharyngeal wash 2011 Jun No B
S. delphini (group B)
4 y, mare
S. equi surveillance
Nasopharyngeal wash
2011 Jul
AHLD MRSP 4 y, mare Cough Respiratory tract 2011 Mar Yes C
MRSP 24 y, UNK Dermatitis (pastern) Skin (pastern) 2011 Apr No C
S. pseudintermedius 6 y, gelding Chronic draining abscess Wound 2011 May No C
MRSP 8 y, mare Nasal/sinus swelling Upper respiratory tract 2011 Jun Yes C
MRSP 19 y, mare Previous uterine infection Uterus 2011 Jun Yes C
MRSP 11 y, gelding Draining sores on neck Neck wound 2011 Jul No C
MRSP 4 y, mare Wound (coronary band) Coronary band wound 2011 Jul Yes C
S. pseudintermedius UNK, mare Prebreeding examination Uterus 2011 Aug No C
S. delphini 3 mo, filly Chronic pneumonia Nasal passage 2012 Jun No D

*ID, identification; MRSP, methicillin-resistant S. pseudintermedius; AHLD, Animal Health Laboratory Database; UNK, unknown.
†A, matrix-assisted laser desorption/ionization–time of flight mass spectrometry (MALDI-TOF), MRSP PCR, direct repeat unit typing, mecA PCR, penicillin-binding protein 2a latex agglutination test, broth microdilution; B, MALDI-TOF, S. delphini PCR, sodA sequence analysis, broth microdilution; C, standard biochemical methods, disk diffusion; D, MALDI-TOF, disk diffusion.

Main Article

Page created: February 19, 2014
Page updated: February 19, 2014
Page reviewed: February 19, 2014
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