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Molecular characterization and phylogenetic analysis of new variants of the porcine epidemic diarrhea virus in Gansu, China in 2012.

Abstract：

: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.

journal_name

Viruses

journal_title

Viruses

authors

Tian Y,Yu Z,Cheng K,Liu Y,Huang J,Xin Y,Li Y,Fan S,Wang T,Huang G,Feng N,Yang Z,Yang S,Gao Y,Xia X

doi

10.3390/v5081991

subject

Has Abstract

pub_date

2013-08-15 00:00:00

pages

1991-2004

issue

8

issn

1999-4915

pii

v5081991

journal_volume

5

pub_type

杂志文章

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