FIG. 5.

Comparative survival of S. enterica serovar Thompson pGT-Kan in vesicles released by Tetrahymena SSU (○) and as free cells remaining uningested in the same solution (□). Cell viability was evaluated by PI staining. The vesicles were produced by Tetrahymena cells that were starved (A) or not starved (B) prior to grazing. Each value represents the mean and standard error of the mean of the proportion of viable serovar Thompson cells over the total number of cells per vesicle or per area around the vesicle for 100 observations under the epifluorescence microscope. Due to the scale of the y axis, the error bars in panel A are too small to be visualized.