VIRUSES 13/11/21 Genetic Characterization of Novel H7Nx Low Pathogenic Avian Influenza Viruses from Wild Birds in South Korea during the Winter of 2020–2021. MDPI and ACS Style Lee, Y.
-N.; Lee, D. -H.; Kwon, J. -H.; Shin, J. -I.; Hong, S.Y.; Cha, R.M.; Baek, Y. AMA Style Lee Y-N, Lee D-H, Kwon J-H, Shin J-I, Hong SY, Cha RM, Baek Y-G, Lee E-K, Sagong M, Heo G-B, Lee K-N, Lee Y-J. VIRUSES 11/11/21 Molecular Analysis of the Avian H7 Influenza Viruses Circulating in South Korea during 2018–2019: Evolutionary Significance and Associated Zoonotic Threats. Avian influenza virus (AIV) subtypes H5 and H7, possessing the ability to mutate spontaneously from low pathogenic (LP) to highly pathogenic (HP) variants, are major concerns for enormous socio-economic losses in the poultry industry, as well as for fatal human infections.
Through antigenic drift and shift, genetic reassortments of the genotypes pose serious threats of increased virulence and pathogenicity leading to potential pandemics. In this study, we isolated the H7-subtype AIVs circulating in the Republic of Korea during 2018–2019, and perform detailed molecular analysis to study their circulation, evolution, and possible emergence as a zoonotic threat. Phylogenetic and nucleotide sequence analyses of these isolates revealed their distribution into two distinct clusters, with the HA gene sharing the highest nucleotide identity with either the A/common teal/Shanghai/CM1216/2017, isolated from wild birds in Shanghai, China, or the A/duck/Shimane/2014, isolated from Japan. Figure 1. FRONT. VET. SCI. 24/06/21 Estimation of the Basic Reproduction Numbers of the Subtypes H5N1, H5N8, and H5N6 During the Highly Pathogenic Avian Influenza Epidemic Spread Between Farms (Corée du Sud) Introduction Highly pathogenic avian influenza (HPAI) is a highly contagious viral disease that infects domestic poultry and wild birds (1).
The HPAI virus can cause an epidemic that may spread rapidly, has a high mortality rate among domestic birds, and devastates the poultry industry (2). Outbreaks of distinct subtypes of HPAI, including H5N1, H5N8, and H5N6, are continually reported worldwide (3–5), and this global HPAI virus dissemination is caused by migratory wild birds (6). The HPAI crisis appears to be a great threat to not only animal health but also public health worldwide. Furthermore, the World Health Organization reported 860 human infection cases of avian influenza A subtype H5N1 (7) after the first human case of HPAI subtype H5N1, which was reported in Hong Kong in 1997 (8). Int. J. Environ. Res. Public Health 13/04/21 Effects of Spatial Characteristics on the Spread of the Highly Pathogenic Avian Influenza (HPAI) in Korea.
MDPI and ACS Style.
VIRUSES 27/02/21 Genetic Characteristics of Avian Influenza Virus Isolated from Wild Birds in South Korea, 2019–2020. Wild aquatic birds, a natural reservoir of avian influenza viruses (AIVs), transmit AIVs to poultry farms, causing huge economic losses.
Therefore, the prevalence and genetic characteristics of AIVs isolated from wild birds in South Korea from October 2019 to March 2020 were investigated and analyzed. Fresh avian fecal samples (3256) were collected by active monitoring of 11 wild bird habitats. Twenty-eight AIVs were isolated. Seven HA and eight NA subtypes were identified. All AIV hosts were Anseriformes species. ►▼ Show Figures Figure 1 This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
SCIENTIFIC REPORTS 29/10/20 Fine-scale tracking of wild waterfowl and their impact on highly pathogenic avian influenza outbreaks in the Republic of Korea, 2014–2015. 1.Webster, R.
G., Bean, W. J., Gorman, O. T., Chambers, T. M. & Kawaoka, Y. VIRUSES 12/02/20 Genetic Characterization of Avian Influenza A (H11N9) Virus Isolated from Mandarin Ducks in South Korea in 2018. In July 2018, a novel avian influenza virus (A/Mandarin duck/South Korea/KNU18-12/2018(H11N9)) was isolated from Mandarin ducks in South Korea.
Phylogenetic and molecular analyses were conducted to characterize the genetic origins of the H11N9 strain. Phylogenetic analysis indicated that eight gene segments of strain H11N9 belonged to the Eurasian lineages. Analysis of nucleotide sequence similarity of both the hemagglutinin (HA) and neuraminidase (NA) genes revealed the highest homology with A/duck/Kagoshima/KU57/2014 (H11N9), showing 97.70% and 98.00% nucleotide identities, respectively. Additionally, internal genes showed homology higher than 98% compared to those of other isolates derived from duck and wild birds. VIRUSES 10/11/19 Molecular Characterization of a Novel Avian Influenza A (H2N9) Strain Isolated from Wild Duck in Korea in 2018.
Introduction. National Veterinary Research and Quarantine Service - 2009 - HPAI outbreaks in Korea : characteristics of 3 past epidemics. Clin Exp Vaccine Res. 2017 July; 6(2): 95–103. Recent outbreaks of highly pathogenic avian influenza viruses in South Korea. VIROLOGY JOURNAL 14/03/17 Surveillance of avian influenza viruses in South Korea between 2012 and 2014.
After the 2008 HPAI outbreak in South Korea, AIV surveillance systems were implemented to monitor the possible introduction of H5 or H7 HPAI.
Nationwide AIV surveillance has resulted in the isolation of many subtypes of AIV in LBMs, duck farms, and wild birds. In the present study, we investigated AIV prevalence and subtypes in each surveillance target according to conduction of the national surveillance system. The prevalence of AIV was 0.6% in the wild bird population and was consistent with the results of a previous surveillance study that demonstrated an overall prevalence of 0.8% in South Korea .
It seems that lower prevalence of AIV isolation was caused by using virus isolation method, not real-time RT-PCR. The number of AIV isolates was found to be higher between winter and spring. AIV was isolated throughout the year in domestic poultry, with the exception of the month of August.
AFP 15/01/15 Corée du Sud: fièvre aphteuse et grippe aviaire. La Corée du Sud, confrontée à une épidémie de fièvre aphteuse et de grippe aviaire, a annoncé aujourd'hui le confinement temporaire des animaux de ferme pour éviter une réédition de la crise de 2011 qui avait entraîné l'abattage de millions de bêtes.
L'ordre de confinement des volailles et du bétail entrera en vigueur samedi à 06H00 (21H00 GMT) pour une période de 36 heures pendant laquelle les services vétérinaires procèderont à la désinfection des installations agricoles. Plusieurs foyers de fièvre aphteuse ont été recensés ces derniers mois et 25.000 porcs ont été abattus. La semaine dernière, une vache a été déclarée porteuse de l'épizootie, premier cas détecté chez un bovin depuis près de quatre ans. Début 2011, la maladie s'était répandue dans toute la péninsule coréenne et avait entraîné l'abattage de 3,5 millions de bêtes (bétails, porcs etc...) dans la seule Corée du Sud.
Le coût avait été estimé à 2,6 milliards de dollars (2,2 milliard d'euros) par Séoul. Influenza aviaire H5N8 en Corée du Sud. ARIRANG_CO_KR 14/03/14 Dog infected with Avian Influenza. Authorities have confirmed that a dog at a farm in Korea's Chungcheongnam-do province has been infected with the H5N8 strain of avian influenza.
Korea's agriculture ministry said Friday that the dog had tested positive for having antibodies against the H5 strain, meaning its immune system is battling the virus. It's the first time in Korea that a mammal has come down with the AI virus. Authorities say the dog became infected after eating an infected chicken at the farm. Prior to this case, it was believed that the AI virus could only be transmitted among the same species.
"More studies need to be conducted on the possible affects of the H5N8 strain virus on mammals. It's raising concerns that humans could be susceptible to the H5N8 strain, but health authorities say that's very unlikely, although the farm's workers are being tested. JOURNAL OF VETERINARY SCIENCE 05/11/14 Pathogenicity of H5N8 Highly Pathogenic Avian Influenza Virus in Chickens, South Korea, 2014. Vet Microbiol. 2014 Oct 10;173(3-4):249-57. Highly pathogenic avian influenza virus (H5N8) in domestic poultry and its relationship with migratory birds in South Korea during 2014. Viruses, Vol. 5, 2013 Characterization of Clade 126.96.36.199 H5N1 Highly Pathogenic Avian Influenza Viruses Isolated from Wild Birds (Mandarin Duck and Eurasian Eagle Owl) in 2010 in Korea.
Abstract: Starting in late November 2010, the H5N1 highly pathogenic avian influenza (HPAI) virus was isolated from many types of wild ducks and raptors and was subsequently isolated from poultry in Korea. We assessed the genetic and pathogenic properties of the HPAI viruses isolated from a fecal sample from a mandarin duck and a dead Eurasian eagle owl, the most affected wild bird species during the 2010/2011 HPAI outbreak in Korea. These viruses have similar genetic backgrounds and exhibited the highest genetic similarity with recent Eurasian clade 188.8.131.52 HPAI viruses. In animal inoculation experiments, regardless of their originating hosts, the two Korean isolates produced highly pathogenic characteristics in chickens, ducks and mice without pre-adaptation.
These results raise concerns about veterinary and public health. CDC EID -JUIN 2012 – Avian Influenza A (H5N1) Virus Antibodies in Poultry Cullers, South Korea, 2003–2004. POULTRY SITE 10/05/11 HPAI Impact on Korea's Broiler Meat Industry. Featured Articles HPAI Impact on Korea's Broiler Meat Industry 10 May 2011 Korea's poultry industry has weathered a series of highly pathogenic avian influenza (HPAI) outbreaks over the last several months with no noticeable impact on the country's broiler meat production, according to SunYoung Choi and Michael G.
Francom in the latest GAIN report from the USDA Foreign Agricultural Service. Highlights Korea’s poultry industry has weathered a series of highly pathogenic avian influenza outbreaks over the last several months with no noticeable impact on the country’s broiler meat production. General Information. Embrapa Labex Korea - 2012 - Hot Topics – H5N1 - Avian Influenza Virus. FAS USDA 05/02/11 HPAI Impact on Korea's Broiler Meat Industry.