数字农科院2.0

An Emerging Duck Egg-Reducing Syndrome Caused by a Novel Picornavirus Containing Seven Putative 2A Peptides

文献类型： 外文期刊

作者： Su, Xin;Shuo, Dun;Luo, Yanqiu;Pan, Xue;Yan, Dawei;Li, Xuesong;Lin, Weishan;Huang, Dongming;Yang, Jianmei;Yuan, Chunxiu;Liu, Qinfang;Teng, Qiaoyang;Li, Zejun

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关键词： emerging;duck egg-reduction syndrome;picornavirus;2A peptides

期刊名称： VIRUSES-BASEL

ISSN：

年卷期： 2022 年 14 卷 5 期

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摘要： Since 2016, frequent outbreaks of egg-reducing syndromes caused by an unknown virus in duck farms have resulted in huge economic losses in China. The causative virus was isolated and identified as a novel species in Avihepatovirus of the picornavirus family according to the current guidelines of the International Committee on Taxonomy of Viruses (ICVT), and was named the duck egg-reducing syndrome virus (DERSV). The DERSV was most closely related to wild duck avihepatovirus-like virus (WDALV) with 64.0%, 76.8%, 77.5%, and 70.7% of amino acid identities of P1, 2C, 3C, and 3D proteins, respectively. The DERSV had a typical picornavirus-like genomic structure, but with the longest 2A region in the reported picornaviruses so far. Importantly, the clinical symptoms were successfully observed by artificially infecting ducks with DERSV, even in the contact exposed ducks, which suggested that DERSV transmitted among ducks by direct contact. The antibody levels of DERSV were correlated with the emergence of the egg-reducing syndromes in ducks in field. These results indicate that DERSV is a novel emerging picornavirus causing egg-reducing syndrome in ducks.

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