Natural Infections of Anopheles Albimanus with Plasmodium in a Small Malaria Focus

McWilson Warren Central America Research Station, Bureau of Tropical Diseases, Center for Disease Control, U.S. Department of Health, Education and Welfare, San Salvador,, El Salvador

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John Mason Central America Research Station, Bureau of Tropical Diseases, Center for Disease Control, U.S. Department of Health, Education and Welfare, San Salvador,, El Salvador

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Jesse Hobbs Central America Research Station, Bureau of Tropical Diseases, Center for Disease Control, U.S. Department of Health, Education and Welfare, San Salvador,, El Salvador

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Entomologic surveys conducted in a small village in an area of known high malaria transmission in El Salvador yielded a high rate of infection in Anopheles albimanus collected inside houses in which cases of malaria had occurred. Of 324 specimens dissected, 12 were found to harbor sporozoites or oocysts. This is in contrast to prior reports of extremely low infection rates in collections of this species from malarious areas, and suggests that under some circumstances A. albimanus does meet the criteria of an effective malaria vector.

Author Notes

Present address: Vector Biology and Control Division, Bureau of Tropical Diseases, Center for Disease Control, Atlanta, Georgia 30333.

Present address: United States Department of Agriculture, Veterinary Services, Tres Picos #79, Mexico, D. F.

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