Korean Journal of Veterinary Service (한국동물위생학회지)

The Korean Society of Veterinary Service (한국동물위생학회)
권호 표지

Genetic characterization and phylogenetic analysis of porcine circovirus type 2 field strains isolated from Korean pocine circovirus disease (PCVD) pigs

돼지 써코바이러스 2형 국내분리주의 유전학적 특성 규명

  • Jin, Wen (Department of Veterinary Medicine and Institution of Veterinary Science, Kangwon National University) ;
  • Han, Jeong-Hee (Department of Veterinary Medicine and Institution of Veterinary Science, Kangwon National University)
  • 김문 (강원대학교 수의학부(대학)) ;
  • 한정희 (강원대학교 수의학부(대학))
  • Published : 2009.03.30
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Abstract

In order to obtain the genetic information of the Korean isolates of porcine circovirus 2 (PCV2), complete genomes of five isolates from Korean PCVD weaned pigs with wasting syndromes were sequenced and compared with those of other published PCV2 isolates. Of the five PCV2 isolates, four (1767 nucleotides) were classified into PCV2b, and one (1,768 nucleotides) was PCV2a. Moreover, it appeared that PCV2b is now the dominant genotype circulating in Korea herds. Total complete genomes of four PCV2b isolates shared $99.1{\sim}99.4%$ nucleotide sequence homology each other, and were only $95.4{\sim}96.2%$ similar to one PCV2a isolate. ORF2 genome of four PCV2b isolates shared over 99% nucleotide sequence and deduced amino acid sequence identity to each other. Nevertheless, those were much divergent with the PCV2a isolate of this study and ranged from $92.3{\sim}92.7%$ nucleotide homology and $91.9{\sim}92.3%$ deduced amino acid sequence homology, respectively. The amino acid sequence alignments of the putative capsid protein identified three major regions of amino acid heterogeneity at residues $59{\sim}91$, $121{\sim}136$ and $190{\sim}210$. Two of those correspond with dominant immunoreactive areas. Phylogenetic analysis based on the complete genome of PCV2 isolates showed that four PCV2b isolates of this study existed the closest relationship with European strains (Netherland, UK and France). One PCV2a isolate was closely related to Japan and North America strains.

Keywords

References

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