the in vitro susceptibility of eight strains of varicella-zoster virus ( vzv ) to e-5- ( 2-bromovinyl ) -2'-deoxyuridine ( bvdu ) was examined in human embryonic fibroblasts by the following techniques : inhibition of focus formation by either cell-free vzv ( 4-day assay ) or cell-associated vzv ( 2-day assay ) , inhibition of viral antigen formation ( 2-day assay ) , and inhibition of viral cytopathogenicity ( 15-day assay ) .
C0016030
fibroblasts
C0007634
cell