Molecular epidemiology of porcine reproductive and respiratory syndrome viruses isolated from 1991 to 2013 in Taiwan

Molecular epidemiology of porcine reproductive and respiratory syndrome viruses isolated from... Porcine reproductive and respiratory syndrome virus (PRRSV) was first identified in Taiwan in 1991, but the genetic diversity and evolution of PRRSV has not been thoroughly investigated over the past 20 years. The aim of this study was to bridge the gap in understanding of its molecular epidemiology. A total of 31 PRRSV strains were collected and sequenced. The sequences were aligned using the MUSCLE program, and phylogenetic analysis were performed by the maximum-likelihood method and the neighbor-joining method using MEGA 5.2 software. In the early 1990s, two prototype strains, WSV and MD001 of the North American genotype, were first identified. Over the years, both viruses evolved separately. The population dynamics of PRRSV revealed that the strains of the MD001 group were predominant in Taiwan. Evolution was manifested in changes in the nsp2 and ORF5 genes. In addition, a suspected newly invading exotic strain was recovered in 2013, suggesting that international spread is still taking place and that it is affecting the population dynamics. Overall, the results provide an important basis for vaccine development for the control and prevention of PRRS. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Molecular epidemiology of porcine reproductive and respiratory syndrome viruses isolated from 1991 to 2013 in Taiwan

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Publisher
Springer Vienna
Copyright
Copyright © 2015 by Springer-Verlag Wien
Subject
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-015-2554-4
Publisher site
See Article on Publisher Site

Abstract

Porcine reproductive and respiratory syndrome virus (PRRSV) was first identified in Taiwan in 1991, but the genetic diversity and evolution of PRRSV has not been thoroughly investigated over the past 20 years. The aim of this study was to bridge the gap in understanding of its molecular epidemiology. A total of 31 PRRSV strains were collected and sequenced. The sequences were aligned using the MUSCLE program, and phylogenetic analysis were performed by the maximum-likelihood method and the neighbor-joining method using MEGA 5.2 software. In the early 1990s, two prototype strains, WSV and MD001 of the North American genotype, were first identified. Over the years, both viruses evolved separately. The population dynamics of PRRSV revealed that the strains of the MD001 group were predominant in Taiwan. Evolution was manifested in changes in the nsp2 and ORF5 genes. In addition, a suspected newly invading exotic strain was recovered in 2013, suggesting that international spread is still taking place and that it is affecting the population dynamics. Overall, the results provide an important basis for vaccine development for the control and prevention of PRRS.

Journal

Archives of VirologySpringer Journals

Published: Nov 1, 2015

References

  • Mutations in the genome of porcine reproductive and respiratory syndrome virus responsible for the attenuation phenotype
    Allende, R; Kutish, GF; Laegreid, W; Lu, Z; Lewis, TL; Rock, DL; Friesen, J; Galeota, JA; Doster, AR; Osorio, FA
  • Diversity and evolution of a newly emerged North American Type 1 porcine arterivirus: analysis of isolates collected between 1999 and 2004
    Fang, Y; Schneider, P; Zhang, WP; Faaberg, KS; Nelson, EA; Rowland, RR

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