Objective To study the spectrum of pathogenic bacteria causing biliary tract infections in patients with gallstones, common bacterial resistance, and drug resistance mechanisms of multiple drug-resistant bacteria. Methods The data of inpatients with biliary tract infections collected in a hospital from 2013 to 2016 were retrospectively analyzed on the results of bacterial culture of bile or gallbladder tissues and in vitro drug susceptibility test of bacteria. Polymerase chain reaction(PCR) were used to det...