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The re-emergence of highly pathogenic avian influenza H7N9 viruses in humans in mainland China, 2019

2019; European Centre for Disease Prevention and Control; Volume: 24; Issue: 21 Linguagem: Inglês

10.2807/1560-7917.es.2019.24.21.1900273

1560-7917

Deshan Yu, Guofeng Xiang, Wenfei Zhu, Xia Lei, Baodi Li, Yao Meng, Lei Yang, Hongyan Jiao, Xiyan Li, Jing‐Kai Huang, Hejiang Wei, Yanping Zhang, Hai Yan, Hui Zhang, Hua Yue, Shumei Zou, Xiang Zhao, Chao Li, Deng Ao, Ye Zhang, Minju Tan, Jia Liu, Xuemei Zhang, George F. Gao, Lei Meng, Dayan Wang,

Animal Disease Management and Epidemiology

After no reported human cases of highly pathogenic avian influenza (HPAI) H7N9 for over a year, a case with severe disease occurred in late March 2019. Among HPAI H7N9 viral sequences, those recovered from the case and from environmental samples of a poultry slaughtering stall near their home formed a distinct clade from 2017 viral sequences. Several mutations possibly associated to antigenic drift occurred in the haemagglutinin gene, potentially warranting update of H7N9 vaccine strains.