1.Phylogeographical characterization of H5N8 viruses isolated from poultry and wild birds during 2014–2016 in South Korea.
Byung Min SONG ; Eun Kyoung LEE ; Yu Na LEE ; Gyeong Beom HEO ; Hee Soo LEE ; Youn Jeong LEE
Journal of Veterinary Science 2017;18(1):89-94
During 2014–2016 HPAI outbreak in South Korea, H5N8 viruses have been mostly isolated in western areas of the country, which provide wintering habitats for wild birds and have a high density of poultry. Analysis of a total of 101 Korean isolates revealed that primitive H5N8 viruses (C0 group) have evolved into multiple genetic subgroups appearing from various epidemiological sources, namely, the viruses circulating in poultry farms (C1 and C5) and those reintroduced by migratory birds in late 2014 (C2 and C4). No C3 groups were detected. The results may explain the possible reasons of the recent long-term persistence of H5N8 viruses in South Korea, and help to develop the effective measures in controlling HPAI viruses.
Agriculture
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Birds*
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Ecosystem
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Genetic Variation
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Korea*
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Poultry*
2.Genetic characterization of H9N2avian influenza virus previously unrecognized in Korea
Gyeong-Beom HEO ; Soo-Jeong KYE ; Mingeun SAGONG ; Eun-Kyoung LEE ; Kwang-Nyeong LEE ; Yu-Na LEE ; Kang-Seuk CHOI ; Myoung-Heon LEE ; Youn-Jeong LEE
Journal of Veterinary Science 2021;22(2):e21-
In this study, we describe the isolation and characterization of previously unreported Y280-lineage H9N2 viruses from two live bird markets in Korea in June 2020. Genetic analysis revealed that they were distinct from previous H9N2 viruses circulating in Korea and had highest homology to A/chicken/Shandong/1844/2019(H9N2) viruses. Their genetic constellation showed they belonged to genotype S, which is the predominant genotype in China since 2010, where genotype S viruses have infected humans and acted as internal gene donors to H5 and H7 zoonotic influenza viruses. Active surveillance and control measures need to be enhanced to protect the poultry industry and public health.
3.Genetic characterization of H9N2avian influenza virus previously unrecognized in Korea
Gyeong-Beom HEO ; Soo-Jeong KYE ; Mingeun SAGONG ; Eun-Kyoung LEE ; Kwang-Nyeong LEE ; Yu-Na LEE ; Kang-Seuk CHOI ; Myoung-Heon LEE ; Youn-Jeong LEE
Journal of Veterinary Science 2021;22(2):e21-
In this study, we describe the isolation and characterization of previously unreported Y280-lineage H9N2 viruses from two live bird markets in Korea in June 2020. Genetic analysis revealed that they were distinct from previous H9N2 viruses circulating in Korea and had highest homology to A/chicken/Shandong/1844/2019(H9N2) viruses. Their genetic constellation showed they belonged to genotype S, which is the predominant genotype in China since 2010, where genotype S viruses have infected humans and acted as internal gene donors to H5 and H7 zoonotic influenza viruses. Active surveillance and control measures need to be enhanced to protect the poultry industry and public health.
4.Novel reassortants of clade 2.3.4.4 H5N6 highly pathogenic avian influenza viruses possessing genetic heterogeneity in South Korea in late 2017
Yu Na LEE ; Sun Ha CHEON ; Soo Jeong KYE ; Eun Kyoung LEE ; Mingeun SAGONG ; Gyeong Beom HEO ; Yong Myung KANG ; Hyun Kyu CHO ; Yong Joo KIM ; Hyun Mi KANG ; Myoung Heon LEE ; Youn Jeong LEE
Journal of Veterinary Science 2018;19(6):850-854
Novel H5N6 highly pathogenic avian influenza viruses (HPAIVs) were isolated from duck farms and migratory bird habitats in South Korea in November to December 2017. Genetic analysis demonstrated that at least two genotypes of H5N6 were generated through reassortment between clade 2.3.4.4 H5N8 HPAIVs and Eurasian low pathogenic avian influenza virus in migratory birds in late 2017, suggesting frequent reassortment of clade 2.3.4.4 H5 HPAIVs and highlighting the need for systematic surveillance in Eurasian breeding grounds.
Agriculture
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Animals
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Birds
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Breeding
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Ducks
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Ecosystem
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Genetic Heterogeneity
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Genotype
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Influenza in Birds
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Korea
5.Pathogenicity of clade 2.3.4.4 H5N6 highly pathogenic avian influenza virus in three chicken breeds from South Korea in 2016/2017
Seok Chan PARK ; Byung Min SONG ; Yu Na LEE ; Eun Kyoung LEE ; Gyeong Beom HEO ; Soo Jeong KYE ; Kyung hyun LEE ; You Chan BAE ; Youn Jeong LEE ; Bumseok KIM
Journal of Veterinary Science 2019;20(3):e27-
In 2016, novel H5N6 highly pathogenic avian influenza virus emerged in Korea. During the outbreak, the virus caused the largest culling, especially in brown chicken lines. We determined the pathogenicity and transmissibility of the virus in 2 white chicken lines of the specific pathogen-free chickens, broilers and brown chicken line of Korean native chicken (KNC). A KNC had a longer virus shedding period and longer mean death time than others. Our study showed that this characteristic in the KNC might have contributed to a farm-to-farm transmission of the brown chicken farms.
Agriculture
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Animals
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Chickens
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Influenza in Birds
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Korea
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Virulence
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Virus Shedding