Figure 6.

Infection of cytochalasin D-treated RAW cells. Cells were treated with the indicated concentrations of cytochalasin D 30 min prior to the addition of either the wild-type or yopB strains of Y. pseudotuberculosis at a MOI of 0.2. The number of cell-associated bacteria of two independent wells were determined either immediately after the removal of unattached bacteria (filled bars) or 6 hours later (unfilled bars) and the average fold-increase of each strain during the 6-hour infection period is shown in parenthesis.