The majority of chlamydial antigens recognized during primary infection and re-challenge are shared between trachoma serovars.

<p>RIP was performed using lysates made from <i>C. trachomatis</i> serovars A2497 and Ba. Serum from monkey RML134 was used in the experiment and four representative time points throughout the course of infection and re-challenge were analyzed. Antibody to MOMP was serovar-specific, reacting most intensely with the infecting A2497strain. Conversely, antibody reactivity against the other immunogenic proteins was cross-reactive between trachoma serovars demonstrating that these antigens are conserved.