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Investigating Multidrug-Resistant Bacteria in Canine Skin Infections at a Veterinary Teaching Hospital.
Journal of the American Animal Hospital Association
|June 30, 2026
Summary
Multidrug-resistant (MDR) bacteria are common in canine skin infections at veterinary hospitals, with prevalence varying by hospital service and infection type. Staphylococcus pseudintermedius was the most frequent MDR organism identified.
Area of Science:
- Veterinary Medicine
- Infectious Diseases
- Antimicrobial Resistance
Background:
- Multidrug-resistant (MDR) bacteria pose significant risks in veterinary hospitals, impacting treatment efficacy and public health.
- Identifying the prevalence and patterns of MDR bacteria is essential for effective infection control and antimicrobial stewardship.
Purpose of the Study:
- To determine the hospital prevalence of MDR bacterial isolates from canine skin infections.
- To compare MDR prevalence across different veterinary hospital services and infection types.
- To identify the most common MDR bacterial species encountered.
Main Methods:
- Retrospective analysis of hospital records and aerobic skin cultures from August 2021 to November 2024.
- Inclusion of data from 438 cultures, 416 patients, and 647 bacterial isolates.
- Identification and quantification of 196 MDR bacteria from 182 samples.
Main Results:
- Overall hospital prevalence of MDR was 42% among cultures and 30% among isolates.
- Primary Care (68%) and Neurology (62%) services showed the highest MDR prevalence.
- Superficial surgical site infections (34%) and pyodermas (33%) had the highest MDR prevalence; Staphylococcus pseudintermedius was the most common MDR bacteria.
Conclusions:
- Significant prevalence of MDR bacteria in canine skin infections necessitates targeted surveillance and infection control.
- Antimicrobial stewardship programs are crucial to mitigate the spread of MDR organisms in veterinary settings.
- Understanding service-specific and infection-type-specific MDR patterns can inform tailored control strategies.
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