IFNG and infection: In the late phase of infection (on days 19 and 26), 5-LO−/− spleen cells, in contrast to what was observed for WT spleen cells, showed a sustained elevation in the production of IL-1β (Figure 3(a)) and IL-10 (Figure 3(d)), higher levels of IL-12 (Figure 3(e)), and lower levels of IFN-γ (Figure 3(f)).