The goal of this multicenter randomized controlled trial is to evaluate the additional value of pre-emptive antibiotic treatment on clinically relevant organ/space surgical site infections (OSIs) in patients undergoing pancreatoduodenectomy with a high risk for contaminated bile. The main objectives it aims to answer are: * To evaluate the effect of pre-emptive antibiotic prophylaxis on clinically relevant OSIs in patients undergoing pancreatoduodenectomy with a high risk for contaminated bile * To evaluate the effect of pre-emptive antibiotic prophylaxis on other postoperative outcomes (e.g. OSIs, superficial SSIs, POPF, PPH, major morbidity, ICU admission, readmission, length of hospital stay, and mortality). * To evaluate concordance between perioperatively obtained bile cultures and postoperative cultures from infectious sites, and to evaluate antibiotic sensitivity patterns of the cultured microorganisms. Participants will be randomized with a 1:1 allocation before surgery into the intervention or control group: * Patients in the intervention group will receive perioperative prophylaxis (similar to the control group) followed by five days of 1500mg IV cefuroxime and 500mg IV metronidazole thrice daily. * Patients in the control group will only receive perioperative prophylaxis (a single dose of 5-7mg/kg gentamicin followed by 2gr IV cefazolin and 500mg IV metronidazole every 4h of surgery), which will be discontinued after surgery.
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Rate of clinically relevant organ/space surgical site infection (OSI) between patients with perioperative versus prolonged antibiotic prophylaxis
Timeframe: 90 days after surgery