The T test was used for comparison of the yield of parasite harvested
from Vero and J774 cell cultures in different days post infection
(in first passage). Also, the Fisher’s exact test was used for
comparison of the mortality rate between the different experimental
groups of J and V. In both, differences were considered significant
when P < 0.05, using computer software SPSS version 16 for
windows (SPSS, Chicago, IL, USA).