FIG. 7.

Survival of mice infected with M. tuberculosis H37Rv, the ΔsigD mutant, and the ΔsigD complemented strain. BALB/c mice were infected by lateral tail vein injections with 10⁶ CFU. Morbidity and weights were monitored throughout the experiment, and mice that became moribund were sacrificed. Twelve mice were infected in each group.