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The frequency of bacteremia during ERCP with cholangioscopy has not been well studied. There are no formal guidelines regarding antibiotic prophylaxis before ERCP with cholangioscopy. The aim was to estimate the frequency of bacteremia and subsequent infectious adverse events after ERCP with cholangioscopy.

This prospective nonrandomized study performed in a single tertiary referral center included adult patients who were undergoing ERCP with cholangioscopic examination of the common bile duct. Blood cultures were drawn from patients before the procedure and 5 and 30 minutes after the procedure. Antibiotics were not given before or after the procedure. Patients were followed up after 24 hours and 1 week after the procedure for infectious adverse events. The primary outcome was bacteremia rate, and secondary outcomes were cholangitis rate and adverse events …