Table 3.

Mortality rate and lifespan of mice immunized 90 days before the experiment and infected with 6 virulent strains of F. tularensis. Values are indicated with the standard error of the mean (SEM).

Strain	Subspecies	Mortality Rate, %	Average Lifespan, Days
1045	holarctica	3.7 ± 3.6	8 *
X-3		7.4 ± 5	7.5 ± 0.5
120	mediasiatica	16.7 ± 6.8	11 ± 1
554		20.7 ± 7.5	10.3 ± 0.8
8859	tularensis	28.1 ± 7.9	8.9 ± 0.7
ACole		43.8 ± 8.8	10.6 ± 1

* Only one death was recorded, so it is impossible to indicate the SEM.