TNF levels in p55∆NS mice were significantly higher (p < 0.05) at day 21 compared to WT mice (Fig. 4d), while IL-12p70 concentrations showed a non-significant trend towards enhancement in p55∆NS mice compared to WT mice at 21 days post-infection but was significantly reduced si at day 28 (Fig. 4e). The gene discussed is TNF; the disease is infection.