Canine Distemper

Canine distemper is a very serious viral disease affecting animals in the families Canidae, Mustelidae, Mephitidae, hyaenidae, aileridae, Procyonidae, Pinnipedia, some Viverridae and Felidae (though not domestic cats; feline distemper or panleukopenia is a virus exclusive to cats). It is most commonly associated with domestic animals such as dogs, although ferrets are also vaccinated for it. It is a single-stranded RNA virus of the family paramyxovirus, and thus a close relative of measles and rinderpest. Despite extensive vaccination in many regions, it remains a major disease of dogs. more from Wikipedia