Continued Circulation of Highly Pathogenic H5 Influenza Viruses in Vietnamese Live Bird Markets in 2018-2021.

Continued Circulation of Highly Pathogenic H5 Influenza Viruses in Vietnamese Live Bird Markets in 2018-2021.
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DOI:
10.3390/v15071596
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发表时间:
2023-07-21
期刊:
Viruses
影响因子:
--
通讯作者:
Kawaoka Y
Kawaoka Y
中科院分区:
其他
文献类型:
--
作者:
Guan L;Babujee L;Browning VL;Presler R;Pattinson D;Nguyen HLK;Hoang VMP;Le MQ;van Bakel H;Neumann G;Kawaoka Y

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2018 - 2021年在越南北部省份活禽市场常规监测中分离出77株高致病性禽流感病毒。这些病毒属于H5N6亚型,属于HA分支2.3.4.4g和2.3.4.4h。有趣的是,我们没有检测到近年来在世界不同地区占主导地位的进化枝2.3.4.4b病毒。本研究中分离的病毒不编码哺乳动物适应的主要决定因素(例如PB2-E627K或PB1-D701N),但具有可能影响病毒受体结合、复制或对人类抗病毒因子反应的氨基酸取代。一些高致病性H5N6病毒样本含有其他流感病毒,为重新组合提供了机会。总的来说,我们的研究表明,2018-2021年在越南流行的高致病性H5病毒与世界其他地区不同,越南H5病毒通过突变和重组继续进化。
We isolated 77 highly pathogenic avian influenza viruses during routine surveillance in live poultry markets in northern provinces of Vietnam from 2018 to 2021. These viruses are of the H5N6 subtype and belong to HA clades 2.3.4.4g and 2.3.4.4h. Interestingly, we did not detect viruses of clade 2.3.4.4b, which in recent years have dominated in different parts of the world. The viruses isolated in this current study do not encode major determinants of mammalian adaptation (e.g., PB2-E627K or PB1-D701N) but possess amino acid substitutions that may affect viral receptor-binding, replication, or the responses to human antiviral factors. Several of the highly pathogenic H5N6 virus samples contained other influenza viruses, providing an opportunity for reassortment. Collectively, our study demonstrates that the highly pathogenic H5 viruses circulating in Vietnam in 2018–2021 were different from those in other parts of the world, and that the Vietnamese H5 viruses continue to evolve through mutations and reassortment.
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