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Genetic diversity and evolutionary characteristics of type 2 porcine reproductive and respiratory syndrome virus in southeastern China from 2009 to 2014.
Liu, Jiankui; Zhou, Xia; Zhai, Junqiong; Li, Bing; Wei, Chunhua; Dai, Ailing; Yang, Xiaoyan; Luo, Manlin.
Afiliación
  • Liu J; College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
  • Zhou X; College of Life Sciences of Longyan University, Longyan, 364012, Fujian, China.
  • Zhai J; Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, Longyan University, Longyan, 364012, Fujian, China.
  • Li B; College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
  • Wei C; College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
  • Dai A; College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
  • Yang X; College of Life Sciences of Longyan University, Longyan, 364012, Fujian, China.
  • Luo M; Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, Longyan University, Longyan, 364012, Fujian, China.
Arch Virol ; 162(9): 2603-2615, 2017 Sep.
Article en En | MEDLINE | ID: mdl-28500445
The objective of this study was to assess the genetic diversity of porcine reproductive and respiratory syndrome virus circulating in Fujian province (southeastern China). Based on 53 ORF5 nucleotide sequences collected from nine sites, both highly pathogenic (sublineage 8.7) and lineage 1 strains were circulating in Fujian in 2009-2014 along with lineages 3 and 5.1. Notably, the lineage 1 strains were closely related to the NADC30 strain circulating in North America and were the predominant strains in 2014. In addition, we found that nonstructural protein 2 (NSP2) was the most variable nonstructural protein in Fujian isolates, with a 36-amino-acid (aa) insertion and seven different deletions detected in the 53 sequences examined. Similarly, analysis of GP5 amino acid sequences showed that the isolates were highly variable in primary neutralizing epitopes. Interesting, FJ3.2 and FJ7-2 strains have the mutation N44K, but they exhibited high replication and high titers in MARC-145 and PAM cells. The complete genome sequences determined for 12 type 2 isolates were 82.1-99.3% identical and were 15,016-15,407 nucleotides (nt), in length excluding the poly(A) tail. The strains also shared 88.2-99.4% identity with strain VR2332 (the prototype North American strain), 83.4-99.2% identity with strain JXA1 (the prototype high-pathogenicity Chinese strain), 88.2-97.1% identity with strain CH-1a (the prototype classical Chinese strain), and 82.9-97.1% identity with strain NADC30 (the prototype NADC30-like strain). Strikingly, phylogenetic and molecular evolutionary analyses indicated that strain FJW05 is a spontaneous recombinant between a circulating lineage 1 virus and the vaccine strain JXA1-R, which is derived from the highly pathogenic strain JXA-1. Collectively, the data highlight the epidemiology of porcine reproductive and respiratory syndrome in Fujian and may aid in selecting a suitable vaccine for use on pig farms.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Variación Genética / Virus del Síndrome Respiratorio y Reproductivo Porcino / Síndrome Respiratorio y de la Reproducción Porcina Tipo de estudio: Prevalence_studies / Risk_factors_studies Límite: Animals País/Región como asunto: Asia Idioma: En Revista: Arch Virol Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Austria

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Filogenia / Variación Genética / Virus del Síndrome Respiratorio y Reproductivo Porcino / Síndrome Respiratorio y de la Reproducción Porcina Tipo de estudio: Prevalence_studies / Risk_factors_studies Límite: Animals País/Región como asunto: Asia Idioma: En Revista: Arch Virol Año: 2017 Tipo del documento: Article País de afiliación: China Pais de publicación: Austria