R
Ryota Tsunekuni
Researcher at National Agriculture and Food Research Organization
Publications - 25
Citations - 324
Ryota Tsunekuni is an academic researcher from National Agriculture and Food Research Organization. The author has contributed to research in topics: Influenza A virus subtype H5N1 & Virus. The author has an hindex of 9, co-authored 19 publications receiving 237 citations.
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Journal ArticleDOI
Intracontinental and intercontinental dissemination of Asian H5 highly pathogenic avian influenza virus (clade 2.3.4.4) in the winter of 2014-2015
Takehiko Saito,Takehiko Saito,Taichiro Tanikawa,Yuko Uchida,Nobuhiro Takemae,Katsushi Kanehira,Ryota Tsunekuni +6 more
TL;DR: Although the illegal movement of poultry and poultry products cannot be ruled out as a cause of intercontinental and intracontinental dissemination of clade 2.3.4.4 H5 HPAIVs during the winter of 2014–2015, transmission of the viruses by infected migratory birds appears to be a more plausible mechanism for their dissemination.
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Characterization of an H5N8 influenza A virus isolated from chickens during an outbreak of severe avian influenza in Japan in April 2014
Katsushi Kanehira,Yuko Uchida,Nobuhiro Takemae,Hirokazu Hikono,Ryota Tsunekuni,Takehiko Saito,Takehiko Saito +6 more
TL;DR: The results suggest that waterfowl may be able to spread the virus even if they possess antibodies resulting from a previous infection with H5 HPAIV that was antigenically distinguishable from viruses belonging to clade 2.4.3.4, as well as the potential forWaterfowl to act as a virus reservoir and carrier.
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Pathogenicity of H5N8 highly pathogenic avian influenza viruses isolated from a wild bird fecal specimen and a chicken in Japan in 2014.
Taichiro Tanikawa,Katsushi Kanehira,Ryota Tsunekuni,Yuko Uchida,Nobuhiro Takemae,Takehiko Saito,Takehiko Saito +6 more
TL;DR: It was found that the lethality of Miyazaki2014 in chickens was lower than that of Chiba2014; according to the 50% chicken lethal dose, indicating that differences in pathogenicity may not explain why the Japanese poultry outbreaks only involved group C isolates.
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Comparative pathogenicity of H5N6 subtype highly pathogenic avian influenza viruses in chicken, Pekin duck and Muscovy duck.
TL;DR: This study shows that the pathogenicity of the clade 2.3.4.4 H5N6 HPAIVs differs not only between hosts but also within the same host species.
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Genetics and pathogenicity of H5N6 highly pathogenic avian influenza viruses isolated from wild birds and a chicken in Japan during winter 2017-2018.
Junki Mine,Yuko Uchida,Momoko Nakayama,Taichiro Tanikawa,Ryota Tsunekuni,Kirill Sharshov,Nobuhiro Takemae,Ivan Sobolev,Alexander Shestpalov,Takehiko Saito,Takehiko Saito +10 more
TL;DR: Time-measured phylogenetic analyses demonstrated that the Hemagglutinin (HA) and internal genes of these isolates were genetically similar to clade 2.4.3.B H5N8 HPAIVs in Europe during Winter 2016-2017, and Neuraminidase (NA) genes of the poultry and wild bird isolate were gained through distinct reassortments with AIVs that were estimated to have circulated possibly in Siberia during Summer 2017 and Summer 2016.