Conclusion Endoscopy was an important method in diagnosing the gallbladder-intestine fistula.

Methods 900 patients undergoing routine colonoscopy were randomized to conventional colonoscopy A group a dye-spray B group(0.3% indigo carmine used to coat the entire colon).

PCR can significantly improve the detection rate. CMVDNA detection in patients' stool may be helpful to diagnosis, especially for those patients who can not stand the endoscopy examination.