A Case of Winter Coccidiosis in Calves Naturally Infected by Eimeria zuernii

In this clinical case report, winter coccidiosis was aimed to present in a six months old calf. The material of this case was one of the diarrheic calves brought to the Clinic of Internal Medicine unit of Veterinary Faculty of Kafkas University from a farm in which two of the calves had died. At the clinical and parasitological examination of the calf, it was diagnosed that peracute coccidiosis caused by Eimeria zuernii. The number of oocysts per gram of faeces (OPG) was determined as 78.000. Oocysts were composed of 95% E. zuernii and 5 % E. bovis. This case occurred in winter season was described as ‘winter coccidiosis’. Sulpamezathine and supportive therapy were used for treatment of the case and recovery was observed. As a result, the cases of peracute coccidiosis in calves naturally infected by E. zuernii should be considered in winter.