Objective: To impreve positive rate of baritecta detetion in bile from patients with gallbladder gallstone by means of measuremeut of deoxyribonucleic acid (DNA) of bacteria using molecular biolgi-cal procedures.

• 目的:为探索提高胆囊结石患者胆汁细菌检出阳性率,从分子生物学水平研究胆囊结石胆汁细菌脱氧核糖核酸(DNA)。