Table 2.

Infection and survival of BALB/c mice challenged with different doses of three F. tularensis subsp. tularensis strains

Challenge strain	Challenge dose (CFU)	Survivors (%)
SchuS4 (wild type)	550	0
	55	0
	5.5	0
	0.55	50
ΔFTT0798 mutant	590	0
	59	0
	5.9	0
	0.59	50
ΔFTT0791::Cm mutant	100	0
	10	50
	1	80
	0.1	100