1. Department of Infectious Diseases, School of Medicine, University of São Paulo, São Paulo, Brazil
2. Laboratory of Bacteriology-LIM54, Hospital das Clínicas, Institute of Tropical Medicine, University of São Paulo, São Paulo, Brazil
3. Bone Marrow Transplantation Unit, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
4. Infection Control Committee, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil