Estado de la susceptibilidad al DDT de los principales vectores de malaria en Colombia

Abstract

Results are presented of DDT susceptibility tests made in various regions of Colombia since 1959 with adult females of An. albimanus, An. darling and An. nuñeztovari. The tests were made according to the methodology of the World Health Organization, exposing wild-caught mosquitoes to 4% DDT for 1 hour, the diagnostic dose for anophelines. The three species of Anopheles showed susceptibility to DDT in the majority of the sites studies. Some very limited populations had percent mortalities compatible with the presence of resistant individuals, such as An. albimanus in the municipalities of El Carmen (Bolívar); Codazzi, Robles and Valledupar (Cesar) and Acandi (Choco); and An. darling in some localities in the municipality of Quibdo (Choco). The epidemiological implications of these results are discussed and the importance of continuing a strict vigilance at the entomological and epidemiological level is stressed.