Recovery of P. gingivalis from different mouse strains. P. gingivalis is shown as a percentage of the total anaerobic flora at the termination of the experiments. The first three mouse strains (BALB/cJ, A/J, and CAF1/J) correspond to the strains in Fig. 3A, while the second three (BALB/cByJ, C57BL/6J, and CByB6F1/J) are from the experiment shown in Fig. 3B. Bars represent the means from 10 mice ± standard error. No groups were significantly different (P > 0.05).