Reintroduction of highly pathogenic avian influenza A H7N9 virus in southwestern China

被引：3

作者：

He, Dongchang ^{[1
,2
,3
]}

Gu, Min ^{[1
,2
,3
]}

Wang, Xiyue ^{[1
,2
,3
]}

Yan, Yayao ^{[1
,2
,3
]}

Li, Yang ^{[1
,2
,3
]}

Wang, Xiaoquan ^{[1
,2
,3
]}

Hu, Shunlin ^{[1
,2
,3
]}

Liu, Xiufan ^{[1
,2
,3
]}

机构：

[1] Yangzhou Univ, Coll Vet Med, Anim Infect Dis Lab, Yangzhou, Peoples R China

[2] Yangzhou Univ, Jiangsu Coinnovat Ctr Prevent & Control Important, Yangzhou, Peoples R China

[3] Yangzhou Univ, Jiangsu Key Lab Zoonosis, Yangzhou, Peoples R China

来源：

VIRUS GENES | 2023年 / 59卷 / 03期

关键词：

Avian influenza virus; Highly pathogenic; Epidemiology; Phylogeography; A(H7N9) VIRUS; HEMAGGLUTININ;

D O I：

10.1007/s11262-023-01974-4

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Highly pathogenic (HP) avian influenza A H7N9 virus has emerged in China since 2016. In recent years, it has been most prevalent in northern China. However, several strains of HP H7N9 reappeared in southwestern China (Yunnan Province) in 2021. As a result, we are wondering if these viruses have re-emerged in situ or been reintroduced. Here, we present phylogenetic evidence that the HP H7N9 viruses isolated in Yunnan emigrated from northern to southwestern China in 2020. The northern subregion of China has become a novel epicenter in HP H7N9 dissemination. Meanwhile, a cleavage motif re-emerged due to the T341I mutation, implying a parallel evolution. This cross-region transmission, which originated in non-adjacent provinces and traveled a great geographic distance in an unknown way, indicates that HP H7N9 dissemination did not halt in 2020, even under the shadow of the COVID-19 pandemic. Additional surveillance studies in poultry are required to determine the HP H7N9 virus's geographic distribution and spread.

引用

页码：479 / 483

页数：5

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