FIG 5 .

Anti-C. trachomatis MIF titer-dependent IgG reactivity of C. trachomatis but not C. pneumoniae peptide antigens. Thirty-eight C. trachomatis and 8 C. pneumoniae peptide human host-dependent peptide antigens (Fig. 4) were probed with C. trachomatis-positive sera pooled by MIF titer (Fig. 3). Signals are shown in Log₂ RLU IgG signal bars on the scale as described for Fig. 2. The signals of the C. trachomatis peptides correlated strongly with anti-C. trachomatis MIF titers (R = 0.79; P < 10⁻⁶), but those of the C. pneumoniae peptides did not (P > 0.61).