IL4 and infection: In both groups, infection induced significantly increased IL-12p70 expression in cardiac tissue (NI WT vs. Inf WT, p = 0.04, t = 2.32 and NI IL-4−/− vs. Inf IL-4−/−, p = 0.04, t = 2.39), but with no difference between WT and IL-4−/−, in situ or systemically (p > 0.05, Figure 2).