Epidemiological study of dogs with otitis externa in Cape Breton, Nova Scotia
Estudo epidemiológico de cães com otite externa em Cape Breton, Nova Escócia
From May 2008 to December 2013, 320 cases of otitis externa were diagnosed among 2012 dogs
undergoing routine physical examinations at Celtic Creatures Veterinary Clinic, Sydney River, Nova Scotia for a
diagnosis frequency of 15.9% [95% confidence interval (CI): 14.3% to 17.6%]. Twenty-four percent of these dogs
exhibited 1 or multiple recurrences despite initial treatment with topical antimicrobial/anti-inflammatory solutions.
The frequency of diagnosis was significantly higher in breeds with pendulous ears, but was not affected by ear
hairiness. There were no seasonal patterns in the frequency of diagnosis. In clinical examination of 60 dogs with
otitis externa, bacteria were evident in 47% of infections. Of 10 genera cultured, Staphylococcus spp. and diptheroids
were most common. In this study, analysis of clinical records provided insights into the local prevalence of otitis
externa and the efficacy of treatment in routine clinical situations.