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Staphylococcus pseudintermedius necrotizing fasciitis in a dog.

J Scott Weese¹, Roberta Poma, Fiona James

¹Departments of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada. jsweese@uoguelph.ca

The Canadian Veterinary Journal = La Revue Veterinaire Canadienne

|September 2, 2009

Summary

Staphylococcus pseudintermedius caused a fatal necrotizing fasciitis in a dog. This finding suggests staphylococci, not just Streptococcus canis, should be considered in canine necrotizing fasciitis cases.

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Area of Science:

Veterinary Medicine
Infectious Diseases
Microbiology

Background:

Necrotizing fasciitis is a severe bacterial infection.
Streptococcus canis is the commonly identified pathogen in canine necrotizing fasciitis.
Staphylococcus pseudintermedius is a common bacterium in dogs.

Observation:

A dog presented with rapidly progressive and fatal necrotizing fasciitis.
The causative agent was identified as Staphylococcus pseudintermedius.
The isolate was methicillin-susceptible and lacked Panton-Valentine leukocidin genes.

Findings:

Staphylococcus pseudintermedius can cause severe necrotizing fasciitis in dogs.
This case highlights a less common etiology for this severe infection.
The specific virulence factors of this isolate remain to be elucidated.

Implications:

Veterinarians should consider Staphylococcus pseudintermedius in the differential diagnosis of canine necrotizing fasciitis.
This broadens the spectrum of bacterial pathogens associated with this life-threatening condition in dogs.
Further research into staphylococcal virulence factors in necrotizing fasciitis is warranted.