Repeated fecal microbiota transplantations attenuate diarrhea and lead to sustained changes in the fecal microbiota in acute, refractory gastrointestinal graft- <i>versus</i> -host-disease

Acute graft- versus -host disease (aGvHD) is a serious complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT).[1][1] Although aGvHD of any target organ represents morbidity, lower gastrointestinal (GI) tract involvement is complicated by high mortality.[2][2] Here,