Figure 3
Neutralizing activity of A. arborescens essential oil against HSV-1 as determined by plaque reduction assay after 1 h pre-incubation at 37°C (black square) or 4°C (black circle). IC50 of 2.4 μg/ml as determined after 1 h pre-incubation at 37°C, increased to 19.4 μg/ml when HSV-1 was pre-incubated for the same time at 4°C. Results are presented as mean percentage of control of four separate experiments.