[Cryptosporidiosis in grafting of allogeneic bone marrow].

Cryptosporidiosis may cause diarrhea after a conditioning regimen for allogeneic bone marrow transplantation. The case reported here suggests resurgence of latent cryptosporidiosis in early post-graft period, since other causes of immunosuppression such as graft-versus-host disease or transfusional LAV/HTLV III retroviral infection, were absent. The diagnosis was confirmed by rectal biopsy and ultrastructural analysis. Good response to spiramycin was obtained.