Bovine cerebral theileriosis (turning sickness) with spinal cord involvement.

A case of bovine cerebral theileriosis is described in which the principle lesions occurred in the spinal cord and its meninges. These were clogging of vessels with lymphocytes, many of which were parasitised by Theileria sp. schizonts (probably T. mutans), thrombosis and infarction of nervous tissue, and lymphocytic meningomyelitis. Rare cerebral meningeal vessels showed thrombosis. Clinically the animal showed posterior paresis.