FIG. 1.

Primary murine genital infection with C. trachomatis serovar E protects against homotypic or heterotypic challenge (reproduced from reference 12). The course of infection is shown by the solid lines, with each point representing the mean IFU from cervico-vaginal swabs of culture-positive mice at the time points indicated. Above each point is the ratio of the number of culture-positive animals to the number of animals in each group. Symbols: ●, previously uninfected controls; ■, mice previously infected with serovar E. (A) Mice challenged with MoPn (a total of two experiments). (B) Mice challenged with human serovar L2 (one experiment). (C) Mice challenged with human serovar E (one experiment).