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A Survey of Filariasis among Refugees in South Florida
Bienvenido G. Yangco
Bienvenido G. Yangco
Division of Infectious and Tropical Diseases, Department of Internal Medicine, University of South Florida College of Medicine, 12901 North 30th Street, Box 19, Tampa, Florida 33612
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Albert L. Vincent
Albert L. Vincent
Department of Comprehensive Medicine, University of South Florida College of Medicine, 13301 North 30th Street, MHC 6-215, Tampa, Florida 33612
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Ann C. Vickery
Ann C. Vickery
Department of Comprehensive Medicine, University of South Florida College of Medicine, 13301 North 30th Street, MHC 6-215, Tampa, Florida 33612
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Jai K. Nayar
Jai K. Nayar
IFAS, University of Florida, Florida Medical Entomology Laboratory, 200 9th Street, S.E., Vero Beach, Florida 32960
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Donald M. Sauerman
Donald M. Sauerman
IFAS, University of Florida, Florida Medical Entomology Laboratory, 200 9th Street, S.E., Vero Beach, Florida 32960
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Between January 1981 and March 1982, a filariasis survey was conducted among 668 Haitian immigrants and 155 Southeast Asian refugees residing in Florida, U.S.A. Microfilariae were detected only in Haitians, with 6.7% positive for Wuchereria bancrofti and 1.3% positive for Mansonella ozzardi. The majority of individuals with bancroftian filariasis came from five coastal urban areas including Port-au-Prince, Duvalierville, Gonaïves, Leógane and Cap-Haitien. No unequivocal signs of bancroftian filariasis or mansonellosis were seen. Membrane feeding of several species and strains of laboratory-reared mosquitoes on blood from a volunteer microfilaremic with W. bancrofti showed that Aedes aegypti and A. taeniorhynchus, but not Culex quinquefasciatus, were susceptible to infection with the Haitian strain of W. bancrofti. Culicoides furens, a known vector of M. ozzardi in Haiti and present in Florida, was not tested. Further studies are needed to determine the competence of Florida vectors for transmitting W. bancrofti and M. ozzardi to the indigenous human population.
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