Figure 1

Antiviral activity of Res. The inhibition rate of Res on infection with PRV (A): PK-15 cells were first infected with PRV (100TCID₅₀) and then treated with Res. After incubation for 48 h, a CCK-8 assay was performed, and the results were expressed as percent of inhibition in drug-treated cultures compared with the untreated group. Viral titres of PRV at growing conditions with different concentrations of Res (B): PK-15 cells were infected with PRV (100TCID₅₀) and then treated with Res. After incubation for 48 h, the supernatants were collected and analysed for TCID₅₀ values. Values are means ± SD (n = 6). Correlation analyses were evaluated by Pearson r2, ns: p > 0.05, *p < 0.05, **p < 0.01, and ***p < 0.001 vs. PRV-infected cells.