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The characterization of low pathogenic avian influenza viruses isolated from wild birds in northern Vietnam from 2006 to 2009 |
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| Authors: | Hiroki Takakuwa Tetsu Yamashiro Mai Q. Le Lien S. Phuong Hiroichi Ozaki Ryota Tsunekuni Tatsufumi Usui Hiroshi Ito Tsuyoshi Yamaguchi Toshihiro Ito Toshiyuki Murase Etsuro Ono Koichi Otsuki |
| Affiliation: | 1. Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-motoyama, Kita, Kyoto 603-8555, Japan;2. Avian Influenza Research Centre, Kyoto Sangyo University, Kamigamo-motoyama, Kita, Kyoto 603-8555, Japan;3. Center for Infectious Disease Research in Asia and Africa, Institute of Tropical Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan;4. Vietnam Research Station, Nagasaki University, 1 Yersin, Hanoi, Viet Nam;5. Department of Virology, National Institute of Hygiene and Epidemiology, 1 Yersin, Hanoi, Viet Nam;6. Vietnam Veterinary Association, 86 Truong Chinh, Hanoi, Viet Nam;g The Avian Zoonosis Research Center, Faculty of Agriculture, Tottori University, 4-101 Koyama, Tottori 680-8553, Japan;h Department of Veterinary Microbiology, Faculty of Agriculture, Tottori University, 4-101 Koyama, Tottori 680-8553, Japan;i Department of Veterinary Hygiene, Faculty of Agriculture, Tottori University, 4-101 Koyama, Tottori 680-8553, Japan;j Department of Veterinary Public Health, Faculty of Agriculture, Tottori University, 4-101 Koyama, Tottori 680-8553, Japan;k Department of Biomedicine, Center of Biomedical Research, Research Center for Human Disease Modeling, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan |
| Abstract: | 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. |
| Keywords: | Wild bird Avian influenza virus Vietnam |
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