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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Estado de la susceptibilidad de Aedes aegypti a insecticidas en Atlántico (Colombia)
Ronald Maestre S,Gabriela Rey V,Jorge De Las Salas A,Consuelo Vergara S,Liliana Santacoloma,Sergio Goenaga O,María Cristina Carrasquilla F +6 more
TL;DR: The application of chemical insecticides for the control of dengue fever in the department of Atlantico has generated the loss of susceptibility in populations of the mosquito vector.
Journal ArticleDOI
Khellin: A furanochromone with toxicity against Oncopeltus fasciatus (Hemiptera) and Aedes aegypti (Diptera)
Marise Maleck,Fernanda Cristina Carvalho dos Santos,Michele Teixeira Serdeiro,Anthony Érico Guimarães,Bruna Ferreira,Keriman Günaydin,Ana Paula de Almeida,Ceceten. Vassouras, Rj, Brasil +7 more
TL;DR: The main goal was to evaluate the toxicity of khellin in relation to the nymphs of O. fasciatus (Hemiptera) and larvae of A. aegypti (Diptera), the best of the knowledge, concerning furanochromone bioactivity against insect vectors for human disease.
Journal ArticleDOI
altEraÇÕES MorFo-HiStolÓgiCaS EM larVaS DE Aedes aegypti (linnaEUS, 1762) (DiPtEra, CUliCiDaE) CaUSaDaS PElo tanino CatÉQUiCo iSolaDo Da Planta Do CErraDo Magonia pubescens (SaPinDaCEaE)
Cleyde Ferreira Barreto Valotto,Gláucia Cavasin Cavasin,Heloísa Helena Garcia da Silva,Regina Geris,Ionizete Garcia da Silva +4 more
TL;DR: This work presents for the first time, morphohistologic changes caused by the larvicidal activity of tannin catechin extracted from Magonia pubescens on larvae of A. aegypti, showing the potential of this natural larVicidal compound.
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EVALUATION OF SUBLETHAL EFFECTS OF Ipomoea cairica LINN. EXTRACT ON LIFE HISTORY TRAITS OF DENGUE VECTORS.
TL;DR: The reduced reproductive capacity as well as morphological and physiological anomalies are some of the effects that make I. cairica a potential candidate to be used as a new plant-based insecticide to control dengue vectors.
Journal ArticleDOI
Estudo ultra-estrutural do efeito da toxicidade do extrato da Magonia pubescens (ST. HIL.) no mesêntero de larvas de Aedes aegypti (L.) (Diptera: Culicidae)
TL;DR: The toxicity effects of the crude ethanol extract from the peel of the stem of Magonia pubescens and in the mesentery cells of larvae of the Aedes aegypti mosquito at the 3rd stage (L.) (Diptera: Culicidae), were investigated with electronic microscopy and new ultrastructural alterations were evidenced.
References
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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.
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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.
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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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