FIG. 1.

Course of L. monocytogenes infection in control and KO mice. Data are expressed as mean values (n = 4); standard errors of the means did not exceed 0.35. ND, no bacterial colonies detected; ∗, no survivors after day 4. ○, IFN-KO mice; ▪, γδ-KO mice; •, αβ-KO mice; □, controls.