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Updated: Jan 30, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
Phage therapy against methicillin-resistant Staphylococcus pseudintermedius: a novel strategy for canine pyoderma
Xiancheng Feng1, Qingjie Du1, Keyi Wang1
1The College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China.
Introduction:
Methicillin-resistant Staphylococcus pseudintermedius (MRSP) poses a major public health challenge due to its multidrug resistance. Phages represent an innovative therapeutic strategy with considerable potential against drug-resistant bacterial infections.
Methods:
In this study, dogs clinically diagnosed with pyoderma were recruited to establish an epidemiological dataset, and multidrug-resistant S. pseudintermedius strains (including 6 MRSP isolates) were obtained from bacterial cultures. Three high-efficiency lytic phages were isolated using these MRSP strains as hosts and characterized. The combined efficacy of phages and antibiotics was evaluated in a pyoderma model via clinical scoring, histopathological examination, and tissue bacterial load quantification.
Results:
Notably, these phages enhanced MRSP susceptibility to antibiotics, with genomic and proteomic analyses identifying key mediators of phage-mediated S. pseudintermedius lysis. The phage-antibiotic combination exhibited the most significant therapeutic effect on pyoderma, followed by the phage-only group. In contrast, the antibiotic-only group showed no significant improvement compared to the control group, with both yielding poor outcomes.
Discussion:
This study provides a promising therapeutic strategy for the clinical management of canine pyoderma in veterinary medicine and offers valuable insights for safeguarding public health security.
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