1 Department of Infectious Diseases and Tropical Medicine, Laveran Military Teaching Hospital, Marseille, France. Electronic address: philippe.gautret@club-internet.fr.
2 University of Zürich Centre for Travel Medicine, Division of Epidemiology and Communicable Disease, Institute for Social- and Preventive Medicine, UZH, Hirschengraben 84, 8001 Zürich, Switzerland.