Intestinal coccidiosis in a Nilgai calf (Boselaphus tragocamelus)

Intestinal coccidiosis was diagnosed histo-pathologically in a one month old Nilgai calf (Boselaphus tragocamelus) with the history of diarrhoea and haemorrhagic enteritis. Histologically, small intestine revealed necrosis and desquamation of epithelial cells. The cryptic spaces contained aggregations of numerous oocysts and various endogenous developmental stages of Eimeria spp. with cellular reaction predominantly comprised of polymorph nuclear cells, lymphocytes, eosinophils and plasma cells. Two types of morphologically distinct oocysts (unsporulated) were identified in the intestinal contents.