Encephalitis caused by a Sarcocystis-like organism in a steer.

Sarcocystis spp can cause poor growth, anorexia, fever, anemia, muscular weakness, nervousness, abortion, and even death in cattle. Lesions in the CNS of cattle infected with Sarcocystis spp are microscopic and relatively minor, compared with those in other organs. We report extensive encephalitis in a steer attributable to a Sarcocystis-like organism.