传递率(结构动力学)
致病性
病毒学
公共卫生
病毒
生物
中国
H5N1亚型流感病毒
重新分配
H5N1基因结构
医学微生物学
甲型流感病毒
2019年冠状病毒病(COVID-19)
微生物学
医学
地理
传染病(医学专业)
疾病
物理
护理部
考古
隔振
量子力学
病理
振动
作者
Xinxin Cui,Jianzhong Ma,Zifeng Pang,Limin Chi,Cuishan Mai,Hanlin Liu,Ming Liao,Hailiang Sun
标识
DOI:10.1016/j.virs.2024.02.002
摘要
Swine are regarded as “intermediate hosts” or “mixing vessels” of influenza viruses, capable of generating strains with pandemic potential. From 2020 to 2021, we conducted surveillance on swine H1N2 influenza (swH1N2) viruses in swine farms located in Guangdong, Yunnan, and Guizhou provinces in southern China, as well as Henan and Shandong provinces in northern China. We systematically analyzed the evolution and pathogenicity of swH1N2 viruses, and characterized their replication and transmission abilities. The isolated viruses are quadruple reassortant H1N2 viruses containing genes from pdm/09 H1N1 (PB2, PB1, PA and NP genes), triple-reassortant swine (NS gene), Eurasian Avian-like (HA and M genes), and recent human H3N2 (NA gene) lineages. The NA, PB2, and NP of SW/188/20 and SW/198/20 show high gene similarities to A/Guangdong/Yue Fang277/2017 (H3N2). The HA gene of swH1N2 exhibits a high evolutionary rate. The five swH1N2 viruses tested replicated efficiently in human, canine, and swine cells, as well as in the turbinate, trachea, and lungs of mice. A/swine/Shandong/198/2020 efficiently replicated in the respiratory tract of pigs and effectively transmitted among them. Collectively, these current swH1N2 viruses possess zoonotic potential, highlighting the need for strengthened surveillance of swH1N2 viruses.
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