FIG. 3.
Effect of IFN-γ on the growth of C. trachomatis when added prior to infection. Monolayers were incubated with the indicated concentrations of IFN-γ for either 24 or 48 h prior to infection with C. trachomatis serovar A, D, or L2 or strain MoPn. Data are presented as explained in the legend to Fig. 1.