Detection: the presence of cerebral and cardiac lesions can be seen on aborted bovine fetuses originating from a single farm. The parasite is identified in the tissues of many bovine aborted fetuses but also of stillborn calves and, rarely, of clinically affected newborn calves. The diagnosis of the infection is assisted through histopathology and immunohistochemical examination of aborted fetuses and serologic testing of cattle for evidence of infection.
Detection: cerebral and cardiac abnormalities are evident in aborted bovine fetuses from a single farm. The parasite is detected in the tissues of many aborted fetuses, stillborn calves, and occasionally clinically affected newborns. Diagnosis involves histopathology and immunohistochemical examination of aborted fetuses and serologic testing for infection.