Meningoencephalitis caused by concurrent infection with canine distemper virus and a unique sp. in a gray fox.

A deceased 9-wk-old male gray fox () with a history of decreased ambulation and diarrhea was submitted to the Texas A&M Veterinary Medical Diagnostic Laboratory. No significant gross findings were evident on postmortem examination. Histologically, the cerebrum and brainstem had mild necrotizing meningoencephalitis with protozoal schizonts and merozoites.