1. Department of Bacteriology-Hygiene, Department of Infectious Diseases, and Department of Nephrology-Transplantation, University Hospital of Amiens, Amiens, France; UMR CNRS 5557, Center for Microbial Ecology, Nocardiosis French Observatory, School of Pharmacy, University Claude Bernard, Lyon 1, France; and Department of Medical Microbiology, University of California School of Medicine, Davis, California