Monitoring of resistance to the pyrethroid cypermethrin in Brazilian Aedes aegypti (Diptera: Culicidae) populations collected between 2001 and 2003
Marcella Pereira da-Cunha,José Bento Pereira Lima,William G. Brogdon,Gonzalo Efrain Moya,Denise Valle +4 more
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TLDR
Although this pyrethroid was recently started to be used in the country to control the dengue vector, a decrease in susceptibility was noted between both periods analyzed, particularly in the city of Rio de Janeiro, indicating that resistance is due at least in part to a target site alteration.Abstract:
Resistance to cypermethrin of different Aedes aegypti Brazilian populations, collected at two successive periods (2001 and 2002/2003), was monitored using the insecticide-coated bottles bioassay. Slight modifications were included in the method to discriminate between mortality and the knock down effect. Although this pyrethroid was recently started to be used in the country to control the dengue vector, a decrease in susceptibility was noted between both periods analyzed, particularly in the city of Rio de Janeiro. The results indicate that resistance is due at least in part to a target site alteration.read more
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CULTIVATION OF Bacillus thuringiensis var. israelensis H14 IN BIOREACTOR FOR BIOLOGICAL CONTROL OF Aedes aegypti LARVAE
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References
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Journal ArticleDOI
Ion Channels as Targets for Insecticides
TL;DR: At field-use rates, a neurotoxic effect of the ecdysteroid agonist RH-5849 is observed that involves blockage of both muscle and neuronal potassium channels, and the future use of ion channels as targets for chemical and genetically engineered insecticides is discussed.
Journal Article
Simplification of adult mosquito bioassays through use of time-mortality determinations in glass bottles
TL;DR: A simple method is described for treating 250-ml glass Wheaton bottles with insecticide, and using them as test chambers for detecting insecticide resistance in mosquito and sandfly populations.
Journal ArticleDOI
RESISTANCE OF AEDES AEGYPTI TO ORGANOPHOSPHATES IN SEVERAL MUNICIPALITIES IN THE STATE OF RIO DE JANEIRO AND ESPíRITO SANTO, BRAZIL
José Bento Pereira Lima,Marcella Pereira da-Cunha,Ronaldo Carneiro Da Silva Júnior,Allan Kardec Ribeiro Galardo,Sidinei da Silva Soares,Ima Aparecida Braga,Ricardo Pimentel Ramos,Denise Valle +7 more
TL;DR: Exposure of larvae to a diagnostic dose of temephos showed in alterations in susceptibility in all populations, and adults from only one municipality remained susceptible to both fenitrothion and malathion.
Journal Article
Ion channels as targets for insecticides
TL;DR: The method with which the percentage of sodium channel population that needs to be modified to cause repetitive after-discharges can be measured accurately is developed and is applicable to other neuroactive drugs that act through the threshold phenomenon.
Journal ArticleDOI
Aedes aegypti resistance to temephos during 2001 in several municipalities in the states of Rio de Janeiro, Sergipe, and Alagoas, Brazil
TL;DR: Exposure of larvae to the diagnostic dose of temephos revealed resistance in all localities examined, with mortality levels ranging from 4% (Pilares district, Rio de Janeiro, RJ) to 61.9% (Campos dos Goytacazes, RJ).
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