We tested sera of 24 free-ranging European brown bears ( Ursus arctos) from six regions of Slovakia for antibodies to 10 viral agents. We tested sera by an indirect fluorescence antibody test for antibodies to canine distemper virus (CDV), canine coronavirus (CCV), canine parvovirus type 2 (CPV-2), canine adenovirus, canine parainfluenza virus type 2 (CPIV-2), and canine herpesvirus type 1 (CHV-1). We used an enzyme-linked immunosorbent assay for detection of antibodies to hepatitis E virus, bluetongue virus, West Nile virus (WNV), and Aujeszky's disease virus (ADV). We detected antibodies to CDV, CHV-1, CPV-2, CPIV-2, CCV, WNV, and ADV in seven (29%), three (12%), two (8%), two (8%), one (4%), one (4%), and one (4%) bear, respectively. Evidence of exposure of free-ranging European brown bears to CCV and ADV has not been reported.

Slovak University of Agriculture in Nitra Faculty of Agrobiology and Food Resources Department of Veterinary Sciences Tr A Hlinku 2 949 76 Nitra Slovakia

State Veterinary Institute Prague Sídlištní 136 24 165 03 Prague 6 Czech Republic

University of Veterinary and Pharmaceutical Sciences Brno Faculty of Veterinary Hygiene and Ecology Department of Biology and Wildlife Diseases Palackého tř 1946 1 Brno 61200 Czech Republic

University of Veterinary Medicine and Pharmacy in Košice Clinic for Birds and Exotic Animals Komenského 73 041 81 Košice Slovakia

VETSERVIS s r o Kalvária 3 949 01 Nitra Slovakia

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