Molecular Characterization and Phylogenetic Analysis of New Variants of the Porcine Epidemic Diarrhea Virus in Gansu, China in 2012

文献类型： 外文期刊

第一作者： Tian, Yufei

作者： Tian, Yufei;Liu, Yuxiu;Yang, Zhenguo;Tian, Yufei;Yu, Zhijun;Huang, Jing;Xin, Yue;Li, Yuanguo;Wang, Tiecheng;Huang, Geng;Feng, Na;Yang, Songtao;Gao, Yuwei;Xia, Xianzhu;Yu, Zhijun;Fan, Shengtao;Yu, Zhijun;Fan, Shengtao;Cheng, Kaihui

作者机构：

关键词： molecular characterization;spike glycoprotein gene;phylogenetic analysis;porcine epidemic diarrhea virus (PEDV)

期刊名称：VIRUSES-BASEL （ 影响因子：5.048； 五年影响因子：5.127 ）

ISSN： 1999-4915

年卷期： 2013 年 5 卷 8 期

页码：

收录情况： SCI

摘要： Between January 2012 and March 2012, the infection rates of porcine epidemic diarrhea virus (PEDV) increased substantially in vaccinated swine herds in many porcine farms in Gansu Province, China. The spike (S) glycoprotein is an important determinant for PEDV biological properties. To determine the distribution profile of PEDV outbreak strains, we sequenced the full-length S gene of five samples from two farms where animals exhibited severe diarrhea and high mortality rates. Five new PEDV variants were identified, and the molecular diversity, phylogenetic relationships, and antigenicity analysis of Gansu field samples with other PEDV reference strains were investigated. A series of insertions, deletions, and mutations in the S gene was found in five PEDV variants compared with classical and vaccine strains. These mutations may provide stronger pathogenicity and antigenicity to the new PEDV variants that influenced the effectiveness of the CV777-based vaccine. Our results suggest that these new PEDV variant strains in Gansu Province might be from South Korean or South China, and the effectiveness of the CV777-based vaccine needs to be evaluated.

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