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The evolution, pathogenicity and transmissibility of quadruple reassortant H1N2 swine influenza virus in China: A potential threat to public health

文献类型： 外文期刊

作者： Cui, Xinxin 1 ; Ma, Jinhuan 1 ; Pang, Zifeng 1 ; Chi, Lingzhi 4 ; Mai, Cuishan 1 ; Liu, Hanlin 1 ; Liao, Ming 1 ; Sun, Hailiang 1 ;

作者机构： 1.South China Agr Univ, Coll Vet Med, Guangzhou 510642, Peoples R China

2.South China Agr Univ, Key Lab Zoonosis Control & Prevent Guangdong Prov, Guangzhou 510642, Peoples R China

3.South China Agr Univ, Natl & Reg Joint Engn Lab Medicament Zoonosis Prev, Guangzhou 510642, Peoples R China

4.Shandong Vocat Anim Sci & Vet Coll, Weifang 261061, Peoples R China

5.Guangdong Acad Agr Sci, Inst Anim Hlth, Guangzhou 510640, Peoples R China

关键词： Swine influenza virus (SIV); Evolution; Replication; Pathogenicity; Zoonotic potential

期刊名称：VIROLOGICA SINICA （ 影响因子：4.3； 五年影响因子：4.3 ）

ISSN： 1674-0769

年卷期： 2024 年 39 卷 2 期

页码：

收录情况： SCI

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 isolates, 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 isolates replicate efficiently in human, canine, and swine cells, as well as in the turbinate, trachea, and lungs of mice. A/swine/Shandong/ 198/2020 strain efficiently replicates 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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