Conclusion The most common causative strain of gallstone pancreatitis is Bacterium coli.The drug-resistant strain emerges maybe due to bacterium immigration and delitescence in gallbladder mucosa.

• 结论胆源性胰腺炎感染细菌主要以大肠杆菌为主，耐药菌株的出现可能与细菌向胆囊黏膜迁移并发生变异，以L型细菌的形式潜伏于胆囊有关。