Growth kinetics of lineage 1 and 2 WNV strains.

<p>(A) Human Hela, (B) avian DF-1 (duck fibroblasts) and (C) mosquito <i>CT</i> (<i>Culex tarsalis</i>) cells infected with WNV-lin2 (red) or WNV-lin1 (blue) isolates at a multiplicity of infection of 1. Medium was harvested at the indicated days post infection and used in end point dilution assays. Error bars represent the standard error of the mean.