Dominant subtype switch in avian influenza viruses during 2016-2019 in China.

Dominant subtype switch in avian influenza viruses during 2016-2019 in China.
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2016-2019年中国禽流感病毒优势亚型转换

DOI:
10.1038/s41467-020-19671-3
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发表时间:
2020-11-20
影响因子:
16.6
通讯作者:
Shi W
Shi W
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bi Y;Li J;Li S;Fu G;Jin T;Zhang C;Yang Y;Ma Z;Tian W;Li J;Xiao S;Li L;Yin R;Zhang Y;Wang L;Qin Y;Yao Z;Meng F;Hu D;Li D;Wong G;Liu F;Lv N;Wang L;Fu L;Yang Y;Peng Y;Ma J;Sharshov K;Shestopalov A;Gulyaeva M;Gao GF;Chen J;Shi Y;Liu WJ;Chu D;Huang Y;Liu Y;Liu L;Liu W;Chen Q;Shi W

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自2014年以来,我们调查了中国活禽市场的禽流感病毒(AIV)基因组。在这里,我们展示了2016年5月至2019年2月在中国23个省市收集的16,091份样本。我们鉴定了2048个AIV阳性样本并进行了下一代测序。自2016年以来,样本中的AIV阳性率(12.73%)与2014-2016年(26.90%)相比大幅下降。此外,H9 N2已取代H5 N6和H7N9成为鸡和鸭中的主要AIV亚型。值得注意的是,新的抗原和变异体不断出现并在禽类种群中传播,包括H7 N3、H9 N9、H9 N6和H5 N6变异体。重要的是,几乎所有的H9禽流感病毒和许多H7N9和H6 N2毒株都喜欢人类型受体,这增加了人类感染的风险。综上所述,我们在全国范围内的监测显示,自2016年以来,AIV的传播发生了重大变化,这对中国和全球AIV的预防和控制产生了重大影响。在这项研究中,作者提出了一个基因组监测禽流感基因组采样活禽市场在中国。他们报告说,自2016年以来,出现了许多变种,对人类构成了更大的风险。他们强调了对流行的流感病毒株进行持续基因组监测的重要性。
We have surveyed avian influenza virus (AIV) genomes from live poultry markets within China since 2014. Here we present a total of 16,091 samples that were collected from May 2016 to February 2019 in 23 provinces and municipalities in China. We identify 2048 AIV-positive samples and perform next generation sequencing. AIV-positive rates (12.73%) from samples had decreased substantially since 2016, compared to that during 2014–2016 (26.90%). Additionally, H9N2 has replaced H5N6 and H7N9 as the dominant AIV subtype in both chickens and ducks. Notably, novel reassortants and variants continually emerged and disseminated in avian populations, including H7N3, H9N9, H9N6 and H5N6 variants. Importantly, almost all of the H9 AIVs and many H7N9 and H6N2 strains prefer human-type receptors, posing an increased risk for human infections. In summary, our nation-wide surveillance highlights substantial changes in the circulation of AIVs since 2016, which greatly impacts the prevention and control of AIVs in China and worldwide. In this study, the authors present a genomic surveillance of avian influenza genomes sampled from live poultry markets in China. They report that a number of variants have emerged since 2016 that pose an increased risk to humans. They highlight the importance of continuous genome surveillance of circulating influenza strains.
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