MPO and septic shock: Compared to the control group, plasma levels of MPO and IL-8 increased significantly, beginning from the onset of septic shock, and remained significantly elevated over 24 h (Table 2, MPO: CTRL vs. septic shock onset: p < 0.01; CTRL vs. septic shock 24 h: p < 0.01; CTRL vs. septic shock 72 h: p = 0.12; IL-8: CTRL vs. septic shock onset: p < 0.001; CTRL vs. septic shock 24 h: p < 0.01; CTRL vs. septic shock 72 h: p = 0.58).