Fig. 1.

Viral titres of the supernatants collected at 72 h post infection from FCoV (10 TCID₅₀)-infected CRFK cells untreated and treated with Thymus vulgaris essential oil (TEO) at different concentrations (13.5 and 27 μg/ml).

Viral titres were evaluated by endpoint dilution method, expressed as log10 TCID₅₀/50 μl and plotted against TEO at different concentrations (A). Viral nucleic acids were quantified by qPCR, expressed as log10 viral NAs /10 μl and plotted against TEO at different concentrations (B). Bars in the figures indicate the means. Error bars indicate the standard deviation.