Keywords allogeneic hematopoietic stem cell transplantation;clostridium difficile associated diarrhea;clostridium difficile;intestinal flora;antibiotic;

• 异基因造血干细胞移植;艰难梭菌相关性腹泻;艰难梭状芽孢杆菌;肠道菌群;抗生素;