The
specificity of these primers in general PCR was confirmed by using viral genomic DNAs and
plasmids containing target genes of the different RSIVs as templates. In multiplex PCR with all four
primers derived from two variable and two conserved positions in the Pst I restriction fragment of
RSIV, it was possible to distinguish the three different RSIVs, RSIV Namhae, Sachun, and CH-1,
from one another depending upon the different sizes of the PCR amplicons