Legionella pneumophilia serogroup 1 pneumonia recurrence postbone marrow transplantation.

Recurrences of Legionnaires' disease have been reported uncommonly and rarely in immunocompromised children. We describe a 9-year-old girl with 2 episodes of culture proven infection with Legionella pneumophila. First episode occurred during induction chemotherapy for acute lymphoblastic leukemia and the second shortly after the bone marrow transplant.