Fig. 6From: Bacillus subtilis spore vaccines displaying protective antigen induce functional antibodies and protective potencySurvival of mice immunized with the PA spore displaying vaccine and challenged with 6 × 107 CFU (Tox + Cap−) spores of the B. anthracis Sterne strain (equivalent to 100 50% median lethal doses (MLD50s) per animal. ††, P < 0.01; †, P < 0.05; *, P < 0.05Back to article page