Efecto de inhibidores de anhidrasa carbónica en larvas de Anopheles albimanus (Díptera, Culicidae). (Spanish)

Effect of carbonic anhydrase inhibitors on Anopheles albimanus larvae (Diptera: Culicidae). (English)

Carbonic anhydrase (CA) catalyzes the reversible conversion of CO2 to bicarbonate and participates in mechanisms of alkalinization in the intestine of mosquitoes. The toxicity of four CA inhibitors (CAI): acetazolamide (AZM), methazolamide (MZM), ethoxolamide (ETX) and dorzolamide (DZA) were evaluated in larvae of Anopheles albimanus by monitoring mortality 24, 48 and 72 hours post application, at a concentration of 50 ug/ml diluted in dimethyl sulfoxide previously. All IAC reduced the population of larvae in variable proportions. ETX showed the highest toxicity, achieving more than 80% mortality after 24 hours and 98% after 72 hours of application. The CAI, AZM, MZM and DZA showed less toxicity (<50% mortality). Our results indicate that the CAI, including ETX in particular, is a worthy candidate as an alternative for the control of An. albimanus, which is considered a primary vector of malaria in Colombia. [ABSTRACT FROM AUTHOR]

La anhidrasa carbónica (AC) cataliza la conversión reversible del CO2 a bicarbonato y participa en mecanismos de alcalinización en el intestino de mosquitos. Se evalúo la toxicidad de cuatro inhibidores de anhidrasa carbónica (IAC): acetazolamida (AZM), metazolamida (MZM), etoxzolamida (ETX) y dorzolamida (DZA) en larvas de Anopheles albimanus por monitoreo de mortalidad 24, 48 y 72 horas post aplicación, a una concentración de 50 ug/ ml diluido previamente en dimetil sulfóxido. Todos los IAC redujeron la población de larvas en proporciones variables. La ETX mostró la mayor toxicidad que las AZM, MZM y DZA alcanzando una mortalidad superior al 80% después de 24 horas y del 98% después de 72 horas de su aplicación. Nuestros resultados indican que de los IAC, la etoxzolamida, en particular, constituye un candidato valioso como una nueva alternativa de control de formas inmaduras de An. albimanus, considerado el vector primario de malaria en Colombia. [ABSTRACT FROM AUTHOR]

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