Abstract

SANTACOLOMA, Liliana; TIBADUIZA, Tania; GUTIERRREZ, Marcela  and  BROCHERO, Helena. Susceptibility to insecticides of Anopheles darlingi Root 1840, in two locations of the departments of Santander and Caquetá, Colombia. Biomédica [online]. 2012, vol.32, suppl.1, pp.22-28. ISSN 0120-4157.

Introduction. Physiological resistance to insecticides used in public health is the main factor to define strategies for malaria vector control. Objective. To determine the physiological status of insecticide susceptibility of natural populations of An. darlingi from two localities in the Santander and Caquetá departments. Materials and methods. Wild adult Anopheles darlingi females were collected and bioassays using technical grade insecticides were performed following the methods recommended both by the World Health Organization (WHO, 1981) and the Centers for Diseases Control and Prevention (CDC, 1998). Results. The natural populations of An. darlingi from the villages of Gerumano, Solano, Caqueta and Las Margaritas, San Vicente de Chucurí, Santander, showed susceptibility to the pyrethroids lambdacyhalothrin and deltamethrin, to the organochlorate DDT and to the organophosphate fenitrothion with 100% mortality rates in all of the CDC tests and between 95 and 100% in the tests performed following the WHO methods. For the carbamate propoxur the 88% mortality rate obtained in the village of Gerumano following the methods recommended by WHO coincides with the surveillance methods established for surveillance of this molecule. Conclusions. Chemical products whose active ingredients are the molecules tested are effective for control of An. darlingi in the study sites.

Keywords : Anopheles; insecticide resistance; insecticides, organophosphate; carbamates; DDT; Colombia.

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