Genetic evolution of swine influenza A (H3N2) viruses in China from 1970 to 2006

文献类型： 外文期刊

第一作者： Yu, Hai

作者： Yu, Hai;Hua, Rong-Hong;Zhang, Qiang;Liu, Tian-Qiang;Li, Guo-Xin;Tong, Guang-Zhi;Tong, Guang-Zhi;Liu, Hui-Li

作者机构：

期刊名称：JOURNAL OF CLINICAL MICROBIOLOGY （ 影响因子：5.948； 五年影响因子：5.345 ）

ISSN： 0095-1137

年卷期： 2008 年 46 卷 3 期

页码：

收录情况： SCI

摘要： Pigs are susceptible to both human and avian influenza viruses and have been proposed to be intermediate hosts, or mixing vessels, for the generation of pandemic influenza viruses through reassortment or adaptation to the mammalian host. In this study, we summarize and report for the first time the coexistence of wholly human-like H3N2 viruses, double-reassortant H3N2 viruses, and triple-reassortant H3N2 viruses in pigs in China by analyzing the eight genes of swine influenza A (H3N2) viruses found in China from 1970 to 2006. In 1970, the first wholly human-like H3N2 (Hong Kong/68-like) viruses were isolated from pigs in Taiwan, and then in the next years Victoria/75-like, Sydney/97-like, New York/99-like, and Moscow/99-like swine H3N2 viruses were regularly isolated in China. In the 1980s, two triple-reassortant viruses were isolated from pigs. Recently, the double-reassortant viruses containing genes from the human (HA and NA) and avian (PB2, PB1, PA, NP, M, and NS) lineages and the triple-reassortant viruses containing genes from the human (HA and NA), classical swine (NP), and avian (PB2, PB1, PA, M, and NS) lineages emerged in pigs in China. The coexistence of wholly human-like and reassortant viruses provides further evidence that pigs serve as intermediate hosts, or mixing vessels, and emphasizes the importance of reinforcing swine influenza virus surveillance in China.

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