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  • Title: Low prevalence of mupirocin resistance in Staphylococcus pseudintermedius isolates from canine pyoderma in Korea.
    Author: Park JH, Kang JH, Hyun JE, Hwang CY.
    Journal: Vet Dermatol; 2018 Apr; 29(2):95-e37. PubMed ID: 29363211.
    Abstract:
    BACKGROUND: Mupirocin is a topical antibacterial drug used for the treatment of staphylococcal infections, including meticillin-resistant Staphylococcus pseudintermedius (MRSP). The recent emergence of resistance to mupirocin is a major concern in many countries. OBJECTIVES: This study investigated the prevalence and genotype of mupirocin-resistant S. pseudintermedius isolated from pet dogs with pyoderma. SAMPLES: A total of 110 clinical isolates of S. pseudintermedius were collected from dogs with pyoderma (n = 110) between July 2010 and September 2016. All animals were client-owned dogs. METHODS: Low- and high-level mupirocin resistance were evaluated with both the broth microdilution and disk diffusion tests. Mupirocin resistance in S. pseudintermedius isolates was confirmed by genetic analysis of the ileS-2 and naïve ileS genes. RESULTS: MRSP and meticillin-susceptible S. pseudintermedius were detected in 69 and 41 dogs, respectively. One MRSP strain was highly resistant to mupirocin and contained the high-level mupirocin resistance gene ileS-2. There were no low-level mupirocin-resistant isolates. CONCLUSION AND CLINICAL IMPORTANCE: Mupirocin is a useful topical antibacterial for MRSP, but a clinical MRSP isolate that had not previously been exposed to mupirocin exhibited the high-level mupirocin resistance in phenotype and genotype. Therefore, continuous monitoring for mupirocin resistance is important in small animal practice.
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