1. Section de Recherche, Service National des Endemies Majeures, Ministry of Public Health and Population, Port-au-Prince, Haiti
2. Hôpital Le Bon Samaritain, Limbe, Haiti
3. Division of Parasitic Diseases, Center for Infectious Diseases, Centers for Disease Control, Public Health Service, U.S. Department of Health and Human Services, Atlanta, Georgia 30333