Molecular epidemiology of porcine epidemic diarrhea virus in China

Molecular epidemiology of porcine epidemic diarrhea virus in China Since early 2006, porcine epidemic diarrhea virus (PEDV) has been reemerging in immunized swine herds. Open reading frame 3 (ORF3) is the only accessory gene in the PEDV genome. The entire ORF3 genes of 12 PEDV field strains and one vaccine strain were sequenced. The ORF3 genes of Chinese PEDV field strains (excluding CH/GSJIII/07) contain a single 672- or 675-nucleotide (nt) ORF, which encodes a 223- or 224-aa-long peptide. However, the CV777 vaccine strain and CH/GSJIII/07 contain a 276-nt ORF because of a 49-nt deletion at nt 245–293. The Chinese PEDV field strains and PEDV reference strains are divided into three groups based on the phylogenetic relationship of their ORF3 genes. Chinese PEDV field strains (excluding CH/GSJIII/07) have a close phylogenetic relationship to Korean strains and are genetically different from the PEDV vaccine strains. However, CH/GSJIII/07 has a close phylogenetic relationship to two vaccine strains, suggesting that it might have evolved from a live vaccine strain. Chinese PEDV field strains (excluding CH/GSJIII/07) can be differentiated from PEDV vaccine strains by a nested RT-PCR method. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Molecular epidemiology of porcine epidemic diarrhea virus in China

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Publisher
Springer Vienna
Copyright
Copyright © 2010 by Springer-Verlag
Subject
Biomedicine; Infectious Diseases; Medical Microbiology ; Virology
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-010-0720-2
Publisher site
See Article on Publisher Site

Abstract

Since early 2006, porcine epidemic diarrhea virus (PEDV) has been reemerging in immunized swine herds. Open reading frame 3 (ORF3) is the only accessory gene in the PEDV genome. The entire ORF3 genes of 12 PEDV field strains and one vaccine strain were sequenced. The ORF3 genes of Chinese PEDV field strains (excluding CH/GSJIII/07) contain a single 672- or 675-nucleotide (nt) ORF, which encodes a 223- or 224-aa-long peptide. However, the CV777 vaccine strain and CH/GSJIII/07 contain a 276-nt ORF because of a 49-nt deletion at nt 245–293. The Chinese PEDV field strains and PEDV reference strains are divided into three groups based on the phylogenetic relationship of their ORF3 genes. Chinese PEDV field strains (excluding CH/GSJIII/07) have a close phylogenetic relationship to Korean strains and are genetically different from the PEDV vaccine strains. However, CH/GSJIII/07 has a close phylogenetic relationship to two vaccine strains, suggesting that it might have evolved from a live vaccine strain. Chinese PEDV field strains (excluding CH/GSJIII/07) can be differentiated from PEDV vaccine strains by a nested RT-PCR method.

Journal

Archives of VirologySpringer Journals

Published: Sep 1, 2010

References

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