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Porcine reproductive and respiratory syndrome virus (PRRSV) is characteristic of genetically extensive variation. The objective of the present study was to analyze the molecular variation and evolution of porcine reproductive and respiratory syndrome virus in China based on the complete genomic sequences of three highly pathogenic Chinese PRRSV strains isolated in 2006 and the sequences of the amplified...
In this study, an improved DNA-launched (plasmid DNA transfection-based) reverse genetics system with reduced cost and labor was developed for porcine reproductive and respiratory syndrome virus (PRRSV) by introduction of ribozyme elements at both termini of the viral genomic cDNA that were placed under the control of a eukaryotic hybrid promoter. The rescue efficacy of PRRSV with this system was...
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