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Identification and Antimicrobial Susceptibility of Bacteria and Yeasts Isolated from Healthy Dogs and Dogs with Otitis Externa

Authors

  • P. Lyskova,

    1. Address of authors: Department of Biology and Biochemistry, Faculty of Chemical Technology, University of Pardubice, Strossova 239, 530 03 Pardubice, Czech Republic
    2. Corresponding author: Tel.: +420 466 037 704; fax: +420 466 037 068; E-mail: petra.lyskova@upce.cz
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  • M. Vydrzalova,

    1. Address of authors: Department of Biology and Biochemistry, Faculty of Chemical Technology, University of Pardubice, Strossova 239, 530 03 Pardubice, Czech Republic
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  • J. Mazurova

    1. Address of authors: Department of Biology and Biochemistry, Faculty of Chemical Technology, University of Pardubice, Strossova 239, 530 03 Pardubice, Czech Republic
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Department of Biology and Biochemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic

Summary

The bacterial and fungal flora of the external ear canal of dogs with otitis externa and of healthy dogs were studied. The most frequently isolated microorganism from otitic ears was Staphylococcus intermedius (58.8%), followed by Malassezia pachydermatis (30.9%), Streptococcus canis (29.9%), Proteus spp. (14.4%) and Escherichia coli (10.3%). A statistical analysis of our results showed that the prevalence of these microorganisms is significant in dogs with otitis externa. Furthermore, the antimicrobial susceptibility patterns of isolated strains were determined. Majority of all bacterial isolates were most susceptible to gentamicin. Malassezia pachydermatis, the most prevalent yeast in this study, showed an excellent level of susceptibility to all antifungal agents tested.

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