FIG. 7.
(A) Percentage of S. mutans PC3379 per total streptococci in the oral cavity of i.n.-immunized or control mice which were challenged with 2 × 109 CFU of the PC3379 strain for 5 consecutive days. The results shown are geometric means ×/÷ the standard error of the mean (SEM) of five or six mice. Values significantly different from those of unimmunized controls at P < 0.05 (#) are indicated. (B) The percentage of S. mutans PC3379 per total streptococci in the oral cavity of i.g.-immunized or control mice which were challenged with 2 × 109 CFU of the PC3379 strain for 5 consecutive days. The results shown are geometric means ×/÷ the SEM of five or six mice. Values significantly different from those of unimmunized controls at P < 0.01 (∗) are indicated.