Blood samples were collected from six captive bears and nine free-rang
ing Marsican brown bears (Ursus arctos marsicanus) in the Abruzzo Nati
onal Park, Italy, between 1991 and 1995. Sera were tested for evidence
of exposure to canine distemper virus (CDV), canine adenovirus type 2
, canine coronavirus, and canine parvovirus type 2 (CPV-2). Serologic
evidence of CDV and CPV-2 exposure was found in both captive and free-
ranging bears. This may be the first report of CDV exposure in free-ra
nging bears.