Abstract
Five fattening cattle weighing 270-280kg each dies suddenly on a farm in September and October, 1980. Two of them were subjected to autopsy, which revealed congestion and hemorrhage in the brain and the mucosa of the small intestine. Histologically, they exhibited suppurative meningitis with cerebral thrombosis, and necrosis and suppurative inflammation of the mucosal epithelium of the intestine.Haemophilus somnuswas isolated from the brain and other organs in almost pure form, andClostridium perfringensfrom the contents of the small intestine.