We report a case of Enterocytozoon bieneusi infection in a pediatric hematopoietic stem cell transplant recipient in Argentina. Spores were visualized in feces using Calcofluor White and modified trichrome stainings. PCR and sequencing identified E. bieneusi genotype D in fecal samples and liver samples, confirming extraintestinal dissemination of the parasite.
Keywords: Argentina; Enterocytozoon bieneusi; Enterocytozoon bieneusi-genotype D; hematopoietic stem cell transplant; microsporidia; parasites; pediatric.