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Abstract
The study aimed to determine the prevalence and associated risk factors of demodicosis in dogs and the response to treatment. A total of 97 skin scrapings were collected from dogs having demartological lessions brought to 3 veterinary clinics in Hue city. Classifying Demodex spp. was done by observing and measuring dimensions under an optical microscope. Univariate and multivariate binary logistic regression was conducted to compute odds ratio associated with potential risk factors. The result showed that the overall prevalence of demodicosis was 29.9%. No significant associations was observed among sex, breeding method, bathing dogs for canine demodicosis (p>0.05). Meanwhile, breed and age were significantly (p<0.05) associated with the occurrence of demodicosis in dogs. Local breeds recorded the highest prevalence. The chances of demodicosis in local breeds are about 13.2 times higher than foreign breeds. Dogs under 1 year old registerd the highest prevalence with 46,4%. The chances of demodicosis in dogs under 1 year old are 7.1 times higher than in dogs over 3 years old. Following treatment, using Nexgard Spectra containing afoxolaner and milbemycine oxime for 17 dogs with generalised demodicosis reached good respone. At 84 days of treatment clinical signs completely disappeared in all cases.