Malaria infection after allogeneic bone marrow transplantation in a child with thalassemia.

A 12-year-old girl with beta-thalassemia hemoglobin E disease received a marrow transplant from her HLA-identical elder brother in July 1995. She had previously been treated by repeated blood transfusions. Conditioning included busulfan 16 mg/kg for 2 days and cyclophosphamide 120 mg/kg for 2 days. Cyclosporine was used for graft-versus-host disease prophylaxis. Spiking fevers occurred on days 6 and 11. Plasmodium falciparum parasites, both trophozoites and gametocytes, were found on the peripheral blood smear. Quinine 30 mg/kg three times a day for 7 days followed by a single dose of mefloquine 25 mg/kg was given. The fever subsided within 2 days and parasitemia cleared in 4 days. After transplant, the girl autologously reconstituted and was followed-up over 15 months.