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
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
Citations
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Insecticide resistance status of Aedes aegypti in 10 localities in Colombia.
Clara B. Ocampo,Myriam J. Salazar-Terreros,Neila J. Mina,Janet C. McAllister,William G. Brogdon +4 more
TL;DR: This study shows that Ae.
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Pyrethroids in human breast milk: occurrence and nursing daily intake estimation.
Cayo Corcellas,Maria Luisa Feo,João Paulo Machado Torres,Olaf Malm,William Ocampo-Duque,Ethel Eljarrat,Damià Barceló,Damià Barceló +7 more
TL;DR: The composition of pyrethroid mixture depended on the country of origin of the samples, bifenthrin being the most abundant in Brazilian samples, λ-cyhalothrin in Colombian and permethrin in Spanish ones, and the average concentrations were very close to the maximum acceptable levels.
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Dengue vector control strategies in an urban setting: an economic modelling assessment
Paula M. Luz,Paula M. Luz,Tazio Vanni,Jan Medlock,Jan Medlock,A. David Paltiel,Alison P. Galvani +6 more
TL;DR: A dynamic model of d Dengue transmission is developed that assesses the evolution of insecticide resistance and immunity in the human population, thus allowing for long-term evolutionary and immunological effects of decreased dengue transmission.
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Effect of insecticide resistance on development, longevity and reproduction of field or laboratory selected Aedes aegypti populations.
Ademir Jesus Martins,Camila Dutra e Mello Ribeiro,Diogo Fernandes Bellinato,Alexandre Afranio Peixoto,Alexandre Afranio Peixoto,Denise Valle,José Bento Pereira Lima,José Bento Pereira Lima +7 more
TL;DR: The results suggest that mechanisms selected for organophosphate and pyrethroid resistance caused the accumulation of alleles with negative effects on different life-traits and corroborate the hypothesis that insecticide resistance is associated with a high fitness cost.
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Toxic heritage: Maternal transfer of pyrethroid insecticides and sunscreen agents in dolphins from Brazil.
Mariana B. Alonso,Mariana B. Alonso,Mariana B. Alonso,Maria Luisa Feo,Cayo Corcellas,Pablo Gago-Ferrero,Carolina P. Bertozzi,Juliana Marigo,Leonardo Flach,Ana Carolina Oliveira de Meirelles,Vítor Carvalho,Alexandre F. Azevedo,João Paulo Machado Torres,José Lailson-Brito,Olaf Malm,M. Silvia Díaz-Cruz,Ethel Eljarrat,Damià Barceló +17 more
TL;DR: The high PYR and UVF concentrations found in fetuses demonstrate these compounds are efficiently transferred through placenta, the first to report maternal transfer of pyrethroids and UV filters in marine mammals.
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.
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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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