Journal of Biology and Nature

The current study focused on a small goat farm in the Kallakurichi District of Tamil Nadu. A flock of 40 non-descript goats experienced clinical signs of weakness, anorexia, lethargy, and diarrhoea over a 10-day period in July 2025, resulting in mortality. The necropsy examination was performed at the Department of Veterinary Pathology, Veterinary College and Research Institute in Salem. Duodenal mucosa showed extensive haemorrhagic streaks, and the lesions were predominantly observed in the jejunum and ileum, showing thickening of the mucosa with multifocal non-pedunculated nodules on the mucosal surface. Microscopic examination of intestinal scrapings demonstrated unsporulated oocysts of Eimeria arloingi. Histopathological examination showed proliferative enteritis with a moderate inflammatory response characterised by infiltration of lymphocytes, plasma, and eosinophils, with affected intestinal epithelial cells exhibiting the various stages of the life cycle of E. arloingi, including trophozoites, schizonts, microgamonts, macrogamonts, and oocysts. The present study identified coccidiosis infection in the affected goats, and treatment with amprolium 20% powder at a dosage of 2 g/40 kg for 5 days resulted in clinical recovery from the infection.