FIG. 9.

TUNEL analysis in liver tissues from both wild-type and iNOS^−/− mice with similar levels of bacterial growth in the liver. After wild-type and iNOS^−/−mice were infected i.p. with different numbers of CFU of serovar Typhimurium LT2, the infected mice were sacrificed and viable bacterial counts were done with the livers. The mice (n = 3) with a similar range of bacterial growth in liver tissues were then analyzed for TUNEL experiments. Columns and error bars indicate means ± SEM (n = 3). ∗, P < 0.05, and ∗∗, P < 0.01, versus wild-type controls.