When the virus was directly treated
with either the extract or fraction II, the virucidal index (VI)
was equal to 1.81 (PI = 98.4%) and 1.0 (PI = 90%) for
HEp-2 cells, respectively, and 3.0 (PI > 99.9%) and 3.25
(PI > 99.9%) for Vero cells, respectively.