Figure 7.

Controlled microabscesses in TNF^−/− mice after adoptive transfer of lymphocytes from immune mem-TNF mice, but not TNF^−/− mice. Splenic nonadherent cells (2 × 10⁷) from naïve or vaccinated C57BL/6, mem-TNF, and TNF-deficient mice were injected intravenously into TNF^−/− mice as in Figure 6. Representative sections of liver microabscesses were examined 3 days after infection with 10⁴ CFU of LM (n = 4 mice per group, H&E staining). Black arrows point to microabscesses. Original magnifications, ×40.