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Peer-reviewed veterinary case report

Bacteria and yeast causing ear infections in dogs and their

By Lyskova, P et al.·Published in Journal of veterinary medicine. A, Physiology, pathology, clinical medicine·2007·Department of Biology and Biochemistry·View original on PubMed

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Original publication title: Identification and antimicrobial susceptibility of bacteria and yeasts isolated from healthy dogs and dogs with otitis externa.

Species:
dog

Plain-English summary

A study found that dogs with ear infections (otitis externa) often have certain bacteria and yeast in their ears. The most common bacteria found were Staphylococcus intermedius and Streptococcus canis, while the yeast Malassezia pachydermatis was also frequently present. When tested for treatment, most of the bacteria were highly susceptible to gentamicin, a common antibiotic, and the yeast responded well to antifungal medications. This information can help veterinarians choose the right treatments for dogs suffering from ear infections.

People also search for: dog ear infection treatment · Staphylococcus intermedius in dogs · Malassezia pachydermatis treatment for dogs

Abstract

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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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/18045339/