Figure 1. Serum antibody levels in mice following infection/immunization. (A) Anti-whole-specific IgG, (B) rBspA-specific IgG, and (C) rBspA-specific serum IgA. Group A, control (sham-infected and sham-immunized); group B, T. forsythia 43037-infected; group C, BFM571-infected; group D, BspA-immunized and T. forsythia 43037-infected; group E, BspA-immunized. Bars represent mean ± standard error (n = 12).