https://scholars.lib.ntu.edu.tw/handle/123456789/444523
標題: | Influenza B viruses in pigs, Taiwan | 作者: | Tsai C.-P. HSIANG-JUNG TSAI |
關鍵字: | emerging disease; influenza virus; surveys; swine; Taiwan; Zoonosis | 公開日期: | 2019 | 卷: | 13 | 期: | 1 | 起(迄)頁: | 91-105 | 來源出版物: | Influenza and other Respiratory Viruses | 摘要: | Background: Influenza B viruses (IBVs) have never been isolated from natural-infected pigs in clinical cases, although the susceptibility of domestic pigs to experimental IBV infections had been confirmed as well as IBV-specific antibodies were detected from pigs under natural and experimental conditions. Objectives: We aimed to assess and investigate the activities for infection and circulation of IBVs in pigs. Methods: Annual active surveys for influenza have been implemented on swine populations in Taiwan since July 1998. Nasal swabs, trachea, lungs, and blood from pigs were tested using virological and serological assays for influenza. Gene sequences of influenza viral isolates were determined and characterized. Preliminary sero-epidemiological data for influenza virus were investigated. Results: Three strains of IBV were isolated and identified from natural-infected pigs in 2014. Genetic characterization revealed the highest identities (>99%) of molecular sequence with the contemporary IBVs belonged to the B/Brisbane/60/2008 genetic clade of Victoria lineage in the phylogenetic trees for all 8 genes. IBV-specific antibodies were detected in 31 (0.2%; 95%CI: 0.1%-0.2%) of 15?983 swine serum samples from 29 (2.8%; 95%CI: 1.9%-3.9%) of 1039 farm visits under annual active surveys from 2007 through 2017. Seropositive cases have been found sparsely in 1-5 of test prefectures every year except 2015 and 2017 as well as scattered loosely over 26 townships/districts of 11 prefectures in Taiwan cumulatively in 11?years. Conclusions: Influenza B viruse infections from humans to pigs remained sporadic and accidental currently in Taiwan but might have paved potential avenues for newly emerging zoonotic influenza in the future. ? 2018 The Authors. Influenza and Other Respiratory Viruses Published by John Wiley & Sons Ltd. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/444523 | ISSN: | 1750-2640 | DOI: | 10.1111/irv.12588 | SDG/關鍵字: | Article; influenza B; Influenza B virus; nonhuman; pig; priority journal; swine disease; Taiwan; virus isolation; virus strain; agricultural land; animal; blood; genetics; Influenza B virus; isolation and purification; nose; orthomyxovirus infection; phylogeny; pig; serology; swine disease; Taiwan; veterinary medicine; virology; virus replication; virus antibody; Animals; Antibodies, Viral; Farms; Influenza B virus; Nose; Orthomyxoviridae Infections; Phylogeny; Serologic Tests; Sus scrofa; Swine; Swine Diseases; Taiwan; Virus Replication |
顯示於: | 獸醫學系 |
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