数字农科院2.0

Epidemiology, evolution, and biological characteristics of avian influenza A (H11) viruses from wild birds

文献类型： 外文期刊

作者： 赵志国;;田井满;;白晓利;;李明慧;;宋兴栋;;李佳盈;;施建忠;;孔晖晖;;曾显营;;田国彬;;柳金雄;;李呈军;;陈化兰;;李雁冰

关键词： Avian influenza virus; H11 subtype; wild birds; phylogeny; receptor binding specificity; pathogenicity

期刊名称： Virulence

ISSN： 2150-5594

年卷期： 2025 年

页码：

收录情况： SCIE（2025版）

摘要： H11 subtype avian influenza viruses (AIVs) have been identified in both wild and domestic birds. H11N9 viruses from wild birds provided the NA gene to human H7N9 virus in 2013 in China, which caused five waves of human infections. During active surveillance in wild birds in China, 17 H11 viruses were isolated between December 2022 and January 2024, including six H11N1, one H11N2, one H11N3, and nine H11N9. The epidemiology of H11 subtype viruses in public data bases revealed that they distributed across seven continents, and more than 54.9% of H11 viruses originated from wild Anseriformes. Phylogenetic analysis of the HA genes indicated that H11 viruses were classified into Eurasian and North American lineages, and our isolates belonged to the Eurasian lineage. Bayesian phylogeographic analysis suggested that Bangladesh served as a crucial geographical transmission center for H11 viruses in Eurasian lineage. Reassortment indicated that the H11 isolates in the study underwent complex genomic recombination with various subtype AIVs circulating in wild and domestic birds, including the clade 2.3.4.4b H5N1 highly pathogenic viruses, and formed seven genotypes. Notably, 17 H11 isolates acquired several mutations associated with enhanced human-type receptor binding in HA (S137A) and increased mammalian virulence in PB1 (D3V, D622G), PB1-F2 (N66S), M1 (N30D, I43M, T215A), and NS1 (P42S, I106M). Seven representative viruses exhibited dual receptor binding specificity and could infect mice directly without prior adaptation. These findings highlight the potential public health risks posed by H11 viruses from wild birds and emphasize the necessity of enhancing outine surveillance.

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