FIG. 3.

Recombinant Mfa1 protein or rMfa antibodies inhibit P. gingivalis-S. gordonii coadhesion. (A) Tritiated P. gingivalis cells (10⁸) were reacted with rMfa antiserum or with preimmune serum (control) prior to incubation with streptococcal cells adsorbed to a nitrocellulose membrane. (B) Adsorbed S. gordonii cells were reacted with rMfa or control (SerB) protein prior to exposure to tritiated P. gingivalis cells (10⁸). Error bars indicate standard deviations (n = 3). Asterisk, statistically significant in comparison to control (P < 0.01; t test).