Patients who developed wound infection showed a higher IL-6 concentration on POD 2 (42.56 versus 30.02 ng/ml, p = 0.03), POD 3 (36.52 versus 23.62 ng/ml, p = 0.06) and POD 4 (34.43 versus 19.99 ng/ml, p = 0,046), while pulmonary and urinary tract infections had no impact on ip IL-6-levels (Fig. 2). Here, IL6 is linked to urinary tract infection.