Fig. 5.

Reduction of viral genome copy number in PK-15 cells transfected with single or multiple siRNA expression plasmids at 48 or 72 h post-CSFV infection. Genome copy numbers are the means of three experiments. The viral genome copy numbers per nanogram of total RNA from siC-transfected cells, calculated from the standard curve, were 1.55 × 10⁵/ng and 2.11 × 10⁵/ng at 48 and 72 h post-CSFV infection, respectively. Ninety five percent confidence intervals are shown, ^∗P ⩽ 0.05, ^∗∗P ⩽ 0.01.