FIG. 5.

Comparison of growth characteristics of YF-XL, YF-XL-ΔRYF, and YF-std isolates in Vero and C6/36 cells. Cultures were infected with equal volumes of virus stocks at an approximate MOI of 0.03; 0.5-ml aliquots of supernatant were sampled with replacement for 12 consecutive days. The values represent the mean infectivity titers by endpoint assay; error bars indicate the standard deviations of the results for triplicate samples. (A) YF-std in C6/36 cells; (B) YF-XL in C6/36 cells; (C) YF-std in Vero cells; (D) YF-XL in Vero cells; (E) YF-XL-ΔRYF compared to mean of four YF-std isolates, each evaluated in duplicate.