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Evolution, global spread, and pathogenicity of highly pathogenic avian influenza H5Nx clade 2.3.4.4
이동헌,Kateri Bertran,권정훈,David E. Swayne 대한수의학회 2017 Journal of Veterinary Science Vol.18 No.-
Novel subtypes of Asian-origin (Goose/Guangdong lineage) H5 highly pathogenic avian influenza (HPAI) viruses belonging to clade 2.3.4, such as H5N2, H5N5, H5N6, and H5N8, have been identified in China since 2008 and have since evolved into four genetically distinct clade 2.3.4.4 groups (A–D). Since 2014, HPAI clade 2.3.4.4 viruses have spread rapidly via migratory wild aquatic birds and have evolved through reassortment with prevailing local low pathogenicity avian influenza viruses. Group A H5N8 viruses and its reassortant viruses caused outbreaks in wide geographic regions (Asia, Europe, and North America) during 2014–2015. Novel reassortant Group B H5N8 viruses caused outbreaks in Asia, Europe, and Africa during 2016–2017. Novel reassortant Group C H5N6 viruses caused outbreaks in Korea and Japan during the 2016–2017 winter season. Group D H5N6 viruses caused outbreaks in China and Vietnam. A wide range of avian species, including wild and domestic waterfowl, domestic poultry, and even zoo birds, seem to be permissive for infection by and/or transmission of clade 2.3.4.4 HPAI viruses. Further, compared to previous H5N1 HPAI viruses, these reassortant viruses show altered pathogenicity in birds. In this review, we discuss the evolution, global spread, and pathogenicity of H5 clade 2.3.4.4 HPAI viruses.
Reassortant Clade 2.3.4.4 Avian Influenza A(H5N6) Virus in a Wild Mandarin Duck, South Korea, 2016
Kwon, Jung-Hoon,Lee, Dong-Hun,Swayne, David E.,Noh, Jin-Yong,Yuk, Seong-Su,Erdene-Ochir, Tseren-Ochir,Hong, Woo-Tack,Jeong, Jei-Hyun,Jeong, Sol,Gwon, Gyeong-Bin,Lee, Seok,Song, Chang-Seon U.S. Department of Health and Human Services * Cen 2017 Emerging Infectious Diseases Vol.23 No.5
<P>A reassortant clade 2.3.4.4 avian influenza A(H5N6) virus was isolated from a fecal sample of a Mandarin duck (<I>Aix galericulata</I>) in South Korea during October 2016. This virus was genetically similar to H5N6 subtype virus isolates from China, Vietnam, Laos, and Hong Kong, including human isolates.</P>
Kwon, Jung-Hoon,Lee, Dong-Hun,Swayne, David E.,Noh, Jin-Yong,Yuk, Seong-Su,Erdene-Ochir, Tseren-Ochir,Hong, Woo-Tack,Jeong, Jei-Hyun,Jeong, Sol,Gwon, Gyeong-Bin,Song, Chang-Seon Centers for Disease Control and Prevention 2016 Emerging infectious diseases Vol.22 No.3
<P>Highly pathogenic avian influenza A(H5N8) viruses were isolated from migratory waterfowl in South Korea during fall 2014–winter 2015, a recurrence after initial introduction in winter 2014. These reappeared viruses were phylogenetically distinct from isolates circulating in poultry farms in South Korea.</P>
New Reassortant Clade 2.3.4.4b Avian Influenza A(H5N6) Virus in Wild Birds, South Korea, 2017–18
Kwon, Jung-Hoon,Jeong, Sol,Lee, Dong-Hun,Swayne, David E.,Kim, Yu-jin,Lee, Sun-hak,Noh, Jin-Yong,Erdene-Ochir, Tseren-Ochir,Jeong, Jei-Hyun,Song, Chang-Seon U.S. Department of Health and Human Services * Cen 2018 Emerging Infectious Diseases Vol.24 No.10
<P>We isolated new reassortant avian influenza A(H5N6) viruses from feces of wild waterfowl in South Korea during 2017–18. Phylogenetic analysis suggested that reassortment occurred between clade 2.3.4.4b H5N8 and Eurasian low pathogenicity avian influenza viruses circulating in wild birds. Dissemination to South Korea during the 2017 fall migratory season followed.</P>