Detection of Canine Distemper Viral Antigen in Foxes (Vulpes vulpes) in Northwestern Spain

We describe the lesions of natural distemper in red foxes (Vulpes vulpes) in Spain. The avidin-biotin-peroxidase complex (ABC) technique and a monoclonal antibody against the nucleocapsid protein of canine distemper virus were successfully used to confirm canine distemper diagnosis.