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Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Serosurveillance for Japanese encephalitis, Akabane, and Aino viruses for Thoroughbred horses in Korea | J. Vet. Sci. 2008 9 4 381-385 JOURNAL OF Veterinary Science Serosurveillance for Japanese encephalitis Akabane and Aino viruses for Thoroughbred horses in Korea I 1 1 1 1 1 Dong-Kun Yang Byoung-han Kim Chang-Hee Kweon Jin-Ju Nah Hyun-Joo Kim Kyung-Woo Lee Young-Jin Yang2 Kyu-Whan Mun2 National Veterinary Research and Quarantine Service Anyang 430-824 Korea 2Equine Hospital Korea Racing Authority Gwacheon 427-711 Korea Recent global warming trends may have a significant impact on vector-borne viral diseases possibly affecting vector population dynamics and disease transmission. This study measured levels of hemagglutination-inhibition HI antibodies against Japanese encephalitis virus JEV and neutralizing antibodies against Akabane virus AKAV and Aino virus AINV for Thoroughbred horses in Korea. Blood samples were collected from 989 racehorses in several provinces between October 2005 and March 2007. Sera were tested using either an HI assay or a virus neutralization test. Approximately half 49.7 492 989 of the horses tested were antibody-positive for JEV. The HI titer against JEV was significantly correlated with racehorse age p 0.05 . Horses with an HI antibody titer of 1 160 or higher accounted for 3.9 of the animals tested indicating that vectors transmitting arthropod- borne viruses bit relatively few horses. In contrast 3.8 19 497 and 19.5 97 497 of horse sera collected in March 2007 were positive against AKAV and AINV respectively. The presence of antibodies against AKAV and AINV may indicate the multiplication of AKAV and AINV in these horses. Keywords arbovirus racehorse serosurveillance Introduction Populations of Korean horses including native ponies have been gradually increasing with the growth of the racing industry. Approximately 23 000 horses including 8 000 Thoroughbred horses and 15 000 other breeds Jeju horses and Jeju racehorses are raised on 1 142 premises in Korea 12 . Racehorses are important industrial animals in Korea and therefore great care
