Theileria? taurotragi: a probable agent of bovine cerebral theileriosis.

A case of bovine cerebral theileriosis was confirmed at autopsy on a farm where 4 animals out of 70 died. All were less than 2 years old and all showed nervous signs. Serologically, no evidence was found of Theileria mutans or the Theileria parva group in young animals born on the farm. Six out of 13 calves 6-9 months of age were, however, serologically positive for Theileria? taurotragi and it was concluded this species was the probable cause of death of the 4 animals.