Figure 1

Figure 1

Antiviral activity of the extracts against SVCV. The different algal groups selected are indicated. The viral titer was determined at day 6 post-infection as the viral dilution that causes an infection of 50% of the cell line (TCID₅₀). Results were expressed as the mean and SD of four titrations. A T-test was used to determine significant differences at p-value < 0.05 (*) between control (SVCV infected cells) and cells treated with the extracts at day 6 post-infection. Using the calculated percentage of inhibition (PI), the antiviral activity was scored as strong (PI > 90%), moderate (PI between 50 and 90%) and weak (PI < 50%) according to Monteiro et al. [57].