Fecal microbiota transplantation (FMT) was performed to decolonize gastrointestinal tract from antibiotic-resistant bacteria before allogeneic hematopoietic cells transplantation (alloHCT). AlloHCT was complicated by norovirus gastroenteritis, acute graft-versus-host disease, and eosinophilic pancolitis. Norovirus was identified in samples from FMT material. Symptoms resolved after steroids course and second norovirus-free FMT from another donor.
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