The characterization of low pathogenic avian influenza viruses isolated from wild birds in northern Vietnam from 2006 to 2009.
Due to concerns that wild birds could possibly spread H5N1 viruses, surveillance was conducted to monitor the types of avian influenza viruses circulating among the wild birds migrating to or inhabiting in northern Vietnam from 2006 to 2009. An H5N2 virus isolated from a Eurasian woodcock had a close phylogenetic relationship to H5 viruses recently isolated in South Korea and Japan, suggesting that H5N2 has been shared between Vietnam, South Korea, and Japan. An H9N2 virus isolated from a Chinese Hwamei was closely related to two H9N2 viruses that were isolated from humans in Hong Kong in 2009, suggesting that an H9N2 strain relevant to the human isolates had been transmitted to and maintained among the wild bird population in Vietnam and South China. The results support the idea that wild bird species play a significant role in the spread and maintenance of avian influenza and that this also occurs in Vietnam.
Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-motoyama, Kita, Kyoto 603-8555, Japan; Avian Influenza Research Centre, Kyoto Sangyo University, Kamigamo-motoyama, Kita, Kyoto 603-8555, Japan.
Hiroki
H
Takakuwa
Tetsu
T
Yamashiro
Mai Q
MQ
Le
Lien S
LS
Phuong
Hiroichi
H
Ozaki
Ryota
R
Tsunekuni
Tatsufumi
T
Usui
Hiroshi
H
Ito
Tsuyoshi
T
Yamaguchi
Toshihiro
T
Ito
Toshiyuki
T
Murase
Etsuro
E
Ono
Koichi
K
Otsuki
D000818:Animals; D001717:Birds / Q000821:virology; D005843:Geography; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000737:chemistry / Q000235:genetics; D049674:History, 21st Century; D006801:Humans; D053125:Influenza A Virus, H5N2 Subtype / Q000235:genetics / Q000302:isolation & purification; D053127:Influenza A Virus, H9N2 Subtype / Q000235:genetics / Q000302:isolation & purification; D009980:Influenza A virus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D005585:Influenza in Birds / Q000453:epidemiology* / Q000266:history / Q000821:virology*; D009439:Neuraminidase / Q000737:chemistry / Q000235:genetics; D010802:Phylogeny; D014744:Vietnam
D019267:Hemagglutinin Glycoproteins, Influenza Virus; D009439:Neuraminidase
Avian influenza virus; Vietnam; Wild bird