Levels of IL-6 in plasma from sham controls, CLP plus irrelevant antibody (CLP), and CLP plus IFN-γ antibody (CLP + IFN-γ Ab) 12 h after surgery. Values are means ± SEM for sham (n = 6), CLP (n = 9), and CLP + IFN-γ Ab (n = 9). (b) Levels of IL-6 in plasma from sham controls, CLP, and CLP + IFN-γ Ab 24 h after surgery. Values are means ± SEM for sham (n = 14), CLP (n = 17), and CLP + IFN-γ Ab (n = 15). *, P < 0.05 compared to that for sham controls; #, P < 0.05 compared to that for CLP.