Fig. 2From: Genetic diversity of porcine reproductive and respiratory syndrome virus and evaluation of three one-step real-time RT-PCR assays in KoreaPhylogenetic analysis of ORF5 of PRRSV-2 isolates (A). The tree was constructed by maximum likelihood method. Prototype viruses, vaccine viruses used in Korean swine farms were marked with and , respectively. Lineage 1, lineage 5, Kor A, Kor B, and Kor C of field strains obtained from this study was marked with , , , , and , respectively. Genotyping of PRRSV-2 lineage 1 circulating in Korea (B)Back to article page