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Open AccessArticle

Activity In Vitro of Clotrimazole against Canine Methicillin-Resistant and Susceptible Staphylococcus pseudintermedius

Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield AL9 7TA, UK
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Author to whom correspondence should be addressed.
Academic Editor: Leonard Amaral
Received: 26 October 2017 / Revised: 17 November 2017 / Accepted: 18 November 2017 / Published: 22 November 2017
(This article belongs to the Special Issue Top 35 of Antibiotics Travel Awards 2017)
Emergence of multidrug-resistance in Staphylococcus pseudintermedius (SP) has increased interest in topical therapy as an alternative to systemic antibiotics in canine pyoderma. The antifungal imidazole, clotrimazole, is contained in numerous licensed canine ear preparations. Its in vitro activity against SP has not been evaluated, although previous studies have shown that the related imidazole, miconazole, has significant anti-staphylococcal efficacy. We therefore determined minimum inhibitory concentrations (MICs) of clotrimazole amongst 50 SP isolates (25 methicillin-resistant [MR]SP and susceptible [MS]SP) collected from dogs in Germany during 2010–2011 using an agar dilution method (CLSI VET01-A4). MICs amongst MRSP and MSSP were comparable (MIC50 and MIC90 = 1mg/L for both groups, p = 0.317); overall, 49 isolates had MIC = 1 mg/L and one had MIC = 0.5 mg/L. The relatively low MICs obtained in this study are likely to be exceeded by topical therapy and thus further clinical evaluation of clotrimazole use in canine superficial pyoderma and otitis externa caused by MRSP and MSSP is now warranted. View Full-Text
Keywords: Staphylococcus pseudintermedius; clotrimazole; canine; otitis externa; topical therapy Staphylococcus pseudintermedius; clotrimazole; canine; otitis externa; topical therapy
MDPI and ACS Style

Frosini, S.-M.; Bond, R. Activity In Vitro of Clotrimazole against Canine Methicillin-Resistant and Susceptible Staphylococcus pseudintermedius. Antibiotics 2017, 6, 29. https://0-doi-org.brum.beds.ac.uk/10.3390/antibiotics6040029

AMA Style

Frosini S-M, Bond R. Activity In Vitro of Clotrimazole against Canine Methicillin-Resistant and Susceptible Staphylococcus pseudintermedius. Antibiotics. 2017; 6(4):29. https://0-doi-org.brum.beds.ac.uk/10.3390/antibiotics6040029

Chicago/Turabian Style

Frosini, Sian-Marie; Bond, Ross. 2017. "Activity In Vitro of Clotrimazole against Canine Methicillin-Resistant and Susceptible Staphylococcus pseudintermedius" Antibiotics 6, no. 4: 29. https://0-doi-org.brum.beds.ac.uk/10.3390/antibiotics6040029

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