FIG. 1.

Effect of 0.5 and 1.0 μg of azithromycin per ml on chlamydial inclusions in HEp-2 cells. HEp-2 cells were inoculated at an MOI of 0.05. Incubation with azithromycin was started 2 days after infection. Cultures without azithromycin were run in parallel as a control, with complete destruction of the cell monolayer in 6 days. The figure does not include the numbers of atypical inclusions. Data presented are the means ± standard deviations (error bars) of six and four experiments with concentrations of 0.5 and 1.0 μg/ml, respectively.