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16 results on '"Hiromoto, Yasuaki"'

5. Swine influenza virus infection in different age groups of pigs in farrow-to-finish farms in Thailand

Author

Takemae Nobuhiro, Parchariyanon Sujira, Ruttanapumma Ruttapong, Hiromoto Yasuaki, Hayashi Tsuyoshi, Uchida Yuko, and Saito Takehiko

Subjects
Influenza virus, Pig, Surveillance, Farrow-to-finish pig farm, Infectious and parasitic diseases, RC109-216
Abstract

Abstract Background Understanding swine influenza virus (SIV) ecology has become more and more important from both the pig industry and public health points of views. However, the mechanism whereby SIV occurs in pig farms is not well understood. The purpose of this study was to develop a proper strategy for SIV surveillance. Findings We conducted longitudinal monitoring in 6 farrow-to-finish farms in the central region of Thailand from 2008 to 2009. Nasal swabs and serum samples were collected periodically from clinically healthy pigs consisting of sows, fattening pigs, weaned piglets and pigs transferred from other farms. A total of 731 nasal swabs were subjected to virus isolation and 641 serum samples were subjected to detection of SIV antibodies against H1 and H3 subtypes using the hemagglutination inhibition test and ELISA. Twelve SIVs were isolated in this study and eleven were from piglets aged 4 and 8 weeks. Phylogenetical analysis revealed that SIVs isolated from different farms shared a common ancestor. Antibodies against SIVs were detected in fattening pigs on farms with no SIV isolation in the respective periods studied. These observations suggested that piglets aged 8 weeks or younger could be a main target for SIV isolation. Farm-to-farm transmission was suggested for farms where pigs from other farms are introduced periodically. In addition, antibodies against SIVs detected in fattening pigs could be a marker for SIV infection in a farm. Conclusions The present study provided important information on SIV surveillance that will enable better understanding of SIV ecology in farrow-to-finish farms.

Published
2011
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7. Isolation of novel triple‐reassortant swine H3N2 influenza viruses possessing the hemagglutinin and neuraminidase genes of a seasonal influenza virus in Vietnam in 2010

Author

Ngo, Long Thanh, Hiromoto, Yasuaki, Pham, Vu Phong, Le, Ha Thi Hong, Nguyen, Ha Truc, Le, Vu Tri, Takemae, Nobuhiro, and Saito, Takehiko

Subjects
Swine Diseases, Swine, animal diseases, viruses, Influenza A Virus, H3N2 Subtype, Molecular Sequence Data, virus diseases, Neuraminidase, Hemagglutinin Glycoproteins, Influenza Virus, Sequence Analysis, DNA, influenza virus, Viral Proteins, Short Article, Orthomyxoviridae Infections, Vietnam, triple reassortant, surveillance, Animals, Humans, RNA, Viral, H3N2 subtype, Reassortant Viruses
Abstract

Please cite this paper as: Ngo et al. (2012) Isolation of novel triple‐reassortant swine H3N2 influenza viruses possessing the hemagglutinin and neuraminidase genes of a seasonal influenza virus in Vietnam in 2010. Influenza and Other Respiratory Viruses 6(1), 6–10. Surveillance of swine influenza viruses (SIVs) in 31 pig farms in northern and southern parts of Vietnam was conducted. Six H3N2 influenza A viruses were isolated from a pig farm in southern Vietnam. They were novel genetic reassortants between a triple–reassortant SIV and a human seasonal H3N2 virus. Their hemagglutinin and neuraminidase genes were derived from a human virus circulating around 2004–2006 and the remaining genes from a triple‐reassortant SIV that originated in North America. This is the first report describing the isolation of a novel triple‐reassortant SIV in Vietnam.

Published
2011

8. Pathogenicity of Genetically Similar, H5N1 Highly Pathogenic Avian Influenza Virus Strains in Chicken and the Differences in Sensitivity among Different Chicken Breeds

Author

Matsuu, Aya, primary, Kobayashi, Tomoko, additional, Patchimasiri, Tuangthong, additional, Shiina, Takashi, additional, Suzuki, Shingo, additional, Chaichoune, Kridsada, additional, Ratanakorn, Parntep, additional, Hiromoto, Yasuaki, additional, Abe, Haruka, additional, Parchariyanon, Sujira, additional, and Saito, Takehiko, additional

Published
2016
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10. Host Cytokine Responses of Pigeons Infected with Highly Pathogenic Thai Avian Influenza Viruses of Subtype H5N1 Isolated from Wild Birds

Author

Hayashi, Tsuyoshi, primary, Hiromoto, Yasuaki, additional, Chaichoune, Kridsada, additional, Patchimasiri, Tuangthong, additional, Chakritbudsabong, Warunya, additional, Prayoonwong, Natanan, additional, Chaisilp, Natnapat, additional, Wiriyarat, Witthawat, additional, Parchariyanon, Sujira, additional, Ratanakorn, Parntep, additional, Uchida, Yuko, additional, and Saito, Takehiko, additional

Published
2011
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11. Genetic characterization and susceptibility on poultry and mammal of H7N6 subtype avian influenza virus isolated in Japan in 2009

Author

Uchida, Yuko, primary, Kanehira, Katsushi, additional, Mase, Masaji, additional, Takemae, Nobuhiro, additional, Watanabe, Chiaki, additional, Usui, Tatsufumi, additional, Fujimoto, Yoshikazu, additional, Ito, Toshihiro, additional, Igarashi, Manabu, additional, Ito, Kimihito, additional, Takada, Ayato, additional, Sakoda, Yoshihiro, additional, Okamatsu, Masatoshi, additional, Yamamoto, Yu, additional, Nakamura, Kikuyasu, additional, Kida, Hiroshi, additional, Hiromoto, Yasuaki, additional, Tsuda, Tomoyuki, additional, and Saito, Takehiko, additional

Published
2011
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