FIG. 2.

Kinetics of the escape of sporozoites of S. singaporensis from the PV of L2 pneumonocytes. Shown is the mean (± standard deviation) percentage of intravacuolar sporozoites out of all that were in intracellular stages at various time intervals after infection. At 2 h postinfection, all extracellular sporozoites were removed from the cell cultures by washing with medium. The graph summarizes three independent experiments, whereby two coverslips were fixed and analyzed in each experiment and 200 intracellular sporozoites were checked on each coverslip.