بررسي ميزان شيوع كوكسيديوز در تعدادي از گاوداريهاي صنعتي استان البرز

A Study on the prevalence of Bovine Coccidiosis in some Dairy Farms at Alborz Province(Iran)

Coccidiosis is one of the common intestinal infections in calves worldwide. Different Species of Eimeria protozoans causes coccidiosis in dairy farms. These protozoa live in intestinal epithelial cells and its life cycle in intestine causes severe diarrhea in young calves. 15 different Eimeria spp. Had been recognized around the world which E.bovis and E.zurnii are the most virulent. JOURNAL OF VETERINARY CLINICAL RESEARCH J Vet.Clin.Res 2(1)25-31 2011 In this study, 3 dairy farm at Alborz province in Iran were studied. 100 faecal samples were taken and after sporulation of those in 2.5% potassium bichromate presence of Eimerial oocysts were surveyed by using Flotation method such as Clayton-Layn and Modified Mc master techniques. The results showed that infection were only in calves, Mean infection rate was 2%,which this rate is near the results of Razavi and colleagues studies in dairy farms of Shiraz region but is less than Yakhchali study in Sanandaj Province of Iran. All Positive calves in our study were under 3 months of age. The low infection rate in this study is related to animalʹs age, individual characteristics and good management of farms, but the latter is probably more important