scholarly journals Genetic Characterization of Novel H7Nx Low Pathogenic Avian Influenza Viruses from Wild Birds in South Korea during the Winter of 2020–2021

Viruses ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2274
Author(s):  
Yu-Na Lee ◽  
Dong-Hun Lee ◽  
Jung-Hoon Kwon ◽  
Jae-In Shin ◽  
Seo Yun Hong ◽  
...  
Keyword(s):  
Avian Influenza ◽  
South Korea ◽  
Migratory Birds ◽  
Wild Birds ◽  
Influenza Viruses ◽  
The Novel ◽  
Zoonotic Infection ◽  
Avian Influenza Viruses ◽  
Constellation Analysis

Zoonotic infection with avian influenza viruses (AIVs) of subtype H7, such as H7N9 and H7N4, has raised concerns worldwide. During the winter of 2020–2021, five novel H7 low pathogenic AIVs (LPAIVs) containing different neuraminidase (NA) subtypes, including two H7N3, an H7N8, and two H7N9, were detected in wild bird feces in South Korea. Complete genome sequencing and phylogenetic analysis showed that the novel H7Nx AIVs were reassortants containing two gene segments (hemagglutinin (HA) and matrix) that were related to the zoonotic Jiangsu–Cambodian H7 viruses causing zoonotic infection and six gene segments originating from LPAIVs circulating in migratory birds in Eurasia. A genomic constellation analysis demonstrated that all H7 isolates contained a mix of gene segments from different viruses, indicating that multiple reassortment occurred. The well-known mammalian adaptive substitution (E627K and D701N) in PB2 was not detected in any of these isolates. The detection of multiple reassortant H7Nx AIVs in wild birds highlights the need for intensive surveillance in both wild birds and poultry in Eurasia.

Characterization of H10 subtype avian influenza viruses isolated from wild birds in South Korea

2012 ◽  
Vol 161 (1-2) ◽  
pp. 222-228 ◽  
Author(s):  
Hye-Ryoung Kim ◽  
Youn-Jeong Lee ◽  
Jae-Ku Oem ◽  
You-Chan Bae ◽  
Min-Su Kang ◽  
...  
Keyword(s):  
Avian Influenza ◽  
South Korea ◽  
Wild Birds ◽  
Influenza Viruses ◽  
Avian Influenza Viruses

scholarly journals Ecology of H3 avian influenza viruses in Korea and assessment of their pathogenic potentials

2008 ◽  
Vol 89 (4) ◽  
pp. 949-957 ◽  
Author(s):  
Min-Suk Song ◽  
Taek-Kyu Oh ◽  
Ho Jin Moon ◽  
Dai-Woon Yoo ◽  
Eun Ho Lee ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Wild Bird ◽  
Migratory Birds ◽  
Influenza Viruses ◽  
Interspecies Transmission ◽  
Avian Influenza Viruses ◽  
Backyard Poultry ◽  
Live Poultry ◽  
Live Poultry Markets

To determine the genetic origins of novel H3 avian influenza viruses of chickens and ducks in Korea, genetic characterization of H3 avian influenza viruses isolated from live poultry markets and migratory aquatic birds in South Korea during 2004–2006 was conducted. Phylogenetic analysis revealed that at least four novel genotypes of H3N2 and two genotypes of H3N6 avian influenza viruses were co-circulating in backyard poultry of Korea. The viruses were reassortants between H9N2 viruses of Korean chickens and unknown influenza viruses of migratory birds. Genetic comparison of H3 viruses from live bird markets with those from wild bird isolates revealed that certain gene segments of wild bird isolates are related closely to those of Korean group H9N2 viruses isolated from live poultry markets in 2003. Furthermore, animal-challenge studies demonstrated that the pathogenicity of certain avian H3 influenza viruses was altered due to reassortment, leading to H3 avian influenza viruses in Korea that can potentially expand their host range to include mammals. These studies emphasize the continuing need to monitor backyard poultry at live poultry markets to better understand interspecies transmission and the emergence of novel influenza viruses that have the potential to infect humans.

Biologic Characterization of H4, H6, and H9 Type Low Pathogenicity Avian Influenza Viruses from Wild Birds in Chickens and Turkeys

2009 ◽  
Vol 53 (4) ◽  
pp. 552-562 ◽  
Author(s):  
Antonio C. Morales ◽  
Deborah A. Hilt ◽  
Susan M. Williams ◽  
Mary J. Pantin-Jackwood ◽  
David L. Suarez ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Wild Birds ◽  
Influenza Viruses ◽  
Avian Influenza Viruses ◽  
Biologic Characterization

Isolation and Genetic Characterization of Avian Influenza Viruses Isolated from Wild Birds in the Azov-Black Sea Region of Ukraine (2001–2012)

2016 ◽  
Vol 60 (1s) ◽  
pp. 365-377 ◽  
Author(s):  
Denys Muzyka ◽  
Mary Pantin-Jackwood ◽  
Erica Spackman ◽  
Diane Smith ◽  
Oleksandr Rula ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Black Sea ◽  
Genetic Characterization ◽  
Wild Birds ◽  
Influenza Viruses ◽  
Avian Influenza Viruses ◽  
Black Sea Region

scholarly journals Surveillance of avian influenza viruses from 2009 to 2013 in South Korea

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jeong-Hyun Nam ◽  
Erica Españo ◽  
Eun-Jung Song ◽  
Sang-Mu Shim ◽  
Woonsung Na ◽  
...  
Keyword(s):  
Avian Influenza ◽  
South Korea ◽  
Migratory Birds ◽  
East Asian ◽  
Influenza Viruses ◽  
Avian Influenza Viruses ◽  
Isolation Rate ◽  
Surveillance Studies ◽  
Migratory Waterfowl ◽  
Sequence Identity

AbstractAvian influenza viruses (AIVs) are carried by wild migratory waterfowl across migratory flyways. To determine the strains of circulating AIVs that may pose a risk to poultry and humans, regular surveillance studies must be performed. Here, we report the surveillance of circulating AIVs in South Korea during the winter seasons of 2009–2013. A total of 126 AIVs were isolated from 7942 fecal samples from wild migratory birds, with a total isolation rate of 1.59%. H1‒H7 and H9‒H11 hemagglutinin (HA) subtypes, and N1‒N3, N5, and N7‒N9 neuraminidase (NA) subtypes were successfully isolated, with H6 and N2 as the most predominant HA and NA subtypes, respectively. Sequence identity search showed that the HA and NA genes of the isolates were highly similar to those of low-pathogenicity influenza strains from the East Asian-Australasian flyway. No match was found for the HA genes of high-pathogenicity influenza strains. Thus, the AIV strains circulating in wild migratory birds from 2009 to 2013 in South Korea likely had low pathogenicity. Continuous surveillance studies such as this one must be performed to identify potential precursors of influenza viruses that may threaten animal and human health.

Sign in / Sign up

Export Citation Format

Share Document