Fig 11. The kpsF::T20 mutant of F. novicida is highly attenuated by intranasal challenge in BALB/c mice.

Groups of BALB/c mice were challenged intranasally with the parent U112 strain of F. novicida, the kpsF::T20 mutant, or the complemented kpsF mutant. The calculated LD₅₀ values from these experiments are included in Table 6.