Burned Pseudomonas aeruginosa-infected mice immunized against PcrV, a type
III virulence system translocating protein, showed significantly enhanced s
urvival compared to controls. Survival was non-O serotype specific and corr
elated with a reduced systemic microbial load. Infection with a high-level
toxin A-producing strain required supplemental antitoxin treatment to enhan
ce survival.