title: Serosurveillance for Japanese encephalitis virus in wild birds captured in Korea.
abstract: Climate change induced by recent global warming may have a significant impact on vector-borne and zoonotic diseases. For example, the distribution of Japanese encephalitis virus (JEV) has expanded into new regions. We surveyed the levels of hemagglutination-inhibition (HI) antibodies against JEV (Family Flaviviridae, genus Flavivirus) in wild birds captured in Korea. Blood samples were collected from 1,316 wild birds including the following migratory birds: Oceanodroma castro (n = 4), Anas formosa (n = 7), Anas penelope (n = 20), Fulica atra (n = 30), Anas acuta (n = 89), Anas crecca (n = 154), Anas platyrhynchos (n = 214), Aix galericulata (n = 310), and Anas poecilorhyncha (n = 488). All were captured in 16 locations in several Korea provinces between April 2007 and December 2009. Out of the 1,316 serum samples tested, 1,141 (86.7%) were positive for JEV. Wild birds captured in 2009 had a higher seroprevalence of ant-JEV antibodies than those captured in 2007. Wild birds with an HI antibody titer of 1 : 1,280 or higher accounted for 21.2% (280/1,316) of the animals tested. These findings indicated that wild birds from the region examined in our study have been exposed to JEV and may pose a high risk for introducing a new JEV genotype into Korea.
authors: Animal and Plant and Fisheries Quarantine and Inspection Agency, MIFAFF, Anyang 430-757, Korea. yangdk@korea.kr
authors: Dong-Kun
authors: DK
authors: Yang
authors: Yoon-I
authors: YI
authors: Oh
authors: Hye-Ryoung
authors: HR
authors: Kim
authors: Youn-Jeong
authors: YJ
authors: Lee
authors: Oun-Kyong
authors: OK
authors: Moon
authors: Hachung
authors: H
authors: Yoon
authors: Byounghan
authors: B
authors: Kim
authors: Kyung-Woo
authors: KW
authors: Lee
authors: Jae-Young
authors: JY
authors: Song
mesh_terms: D025041:Animal Migration; D000818:Animals; D000835:Animals, Wild; D001715:Bird Diseases / Q000453:epidemiology* / Q000821:virology; D001717:Birds; D004664:Encephalitis Virus, Japanese / Q000235:genetics / Q000302:isolation & purification*; D004672:Encephalitis, Japanese / Q000097:blood / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D005838:Genotype; D006385:Hemagglutination Inhibition Tests; D011159:Population Surveillance; D056910:Republic of Korea / Q000453:epidemiology; D016036:Seroepidemiologic Studies