Survival of mice passively immunized with antibody to type a flagellin. (A) Mice challenged with P. aeruginosa type a strain PAK (≈4.125 × 107 CFU/mouse; log-rank test: anti-flagellin versus NRS, P = 0.0002; median survival: anti-flagellin, 72 h; NRS, 24 h). (B) Mice challenged with P. aeruginosa type a strain N13 (≈5.27 × 106 CFU/mouse; log-rank test: anti-flagellin versus NRS, P = 0.0337; median survival: anti-flagellin, undefined; NRS, 48 h). (C) Mice challenged with P. aeruginosa type a strain N6 (≈3 × 107 CFU/mouse; log-rank test: anti-flagellin versus NRS, P = 0.5713; median survival: anti-flagellin, undefined; NRS, 48 h). (D) Mice challenged with P. aeruginosa type b strain PAO1 ExoU+ (≈8.9 × 106 CFU/mouse; log-rank test: anti-flagellin versus NRS, P = 0.1582; median survival: anti-flagellin, undefined; NRS, 24 h).