| accelerated evolution of prrsv during recent outbreaks in china. | porcine reproductive and respiratory syndrome virus (prrsv) is reported to have evolved at a higher evolutionary rate than other rna viruses. however, whether this virus is capable of evolutionary acceleration during outbreaks remains unknown. in this study, we analyze the data based on orfs of eight newly obtained epidemic prrsvs from hebei province with other viral genomes from genbank. phylogenetic analysis suggested that all isolates during recent outbreaks (2006-2008) are grouped together. ... | 2010 | 20652733 |