Results: 77

Current vector control challenges in the fight against malaria in Brazil

Abstract In Brazil, malaria is an important public health problem first reported in 1560. Historically, fluctuations in malaria cases in Brazil are attributed to waves of economic development; construction of railroads, highways, and hydroelectric dams; and population displacement and land occupation pol...

Liaisons dangereuses: cross-border gene flow and dispersal of insecticide resistance-associated genes in the mosquito Aedes aegypti from Brazil and French Guiana

Mem. Inst. Oswaldo Cruz; 114 (), 2019
BACKGROUND In recent years, South America has suffered the burden of continuous high impact outbreaks of dengue, chikungunya and Zika. Aedes aegypti is the main mosquito vector of these arboviruses and its control is the only solution to reduce transmission. OBJECTIVES In order to improve vector contr...

Insecticidal activity of essential oils in controlling fall armyworm, Spodoptera frugiperda

Arq. Inst. Biol; 86 (), 2019
Fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) is one of the main pests in maize crop with developing resistance to chemical products and Bt technology. Therefore, alternative control methods such as essential oils are important steps in the implementation management strategies for...

Estudio integral de la resistencia a insecticidas en Triatoma infestans (Reduviidae: Triatominae) del Gran Chaco
Comprehensive study of insecticide resistance in Triatoma infestans (Reduviidae: Triatominae) of the Gran Chaco

La enfermedad de Chagas afecta a más de un millón y medio de personas en Argentina y es transmitida principalmente por la vinchuca Triatoma infestans (Klug, 1834). El control químico del vector con insecticidas piretroides constituye la herramienta más utilizada para reducir la incidencia de la enfer...

Fluctuating asymmetry and exposure to pyrethroid insecticides in Triatoma infestans populations in northeastern Argentina

Infect. gent. evol; 74 (), 2019
Fluctuating asymmetry (FA), a phenotypic marker used as indicator of developmental stress or instability, is sometimes associated with insecticide application and resistance. Here we investigated the occurrence and amount of wing size and wing shape FA in Triatoma infestans females and males collected be...

Pyrethroid Resistance Associated With a Decreased DEET Repellency in the Common Bed Bug (Hemiptera: Cimicidae)

J. econ. entomol; 112 (2), 2019
The global resurgence of the bed bug (Cimex lectularius L.) and the widespread resistance of this insect to pyrethroid insecticides have created the need to find alternatives to chemical control. Thus, synthetic or natural repellents have been considered as a suitable choice to control bed bug infestatio...

An oral dose of Fluralaner administered to dogs kills pyrethroid-resistant and susceptible Chagas disease vectors for at least four months

Vet. parasitol; 268 (), 2019
New vector control tools that can fit into a broader integrated vector management strategy are notably lacking. We conducted a seven-month randomized trial to assess the efficacy of a single oral dose of Fluralaner (Bravecto®) administered to dogs on the blood-feeding success, engorgement levels and mor...

Variation in temephos resistance in field populations of Aedes aegypti (Diptera: Culicidae) in the State of Sergipe, Northeast Brazil

Abstract INTRODUCTION The organophosphate temephos was first used in Brazil in the 1960s for the control of Aedes aegypti. Because of its extensive and longstanding use worldwide, selection for mosquito populations resistant to the chemical has been observed not only in different regions of Brazil but ...

Avaliação da atividade locomotora de Aedes aegypti (Diptera: Culicidae) com diferentes perfis de resistência a inseticidas do Estado de São Paulo

Diversas populações de Aedes (Stegomyia) aegypti (Linnaeus) têm mostrado resistência a muitos inseticidas químicos, empregados no controle desse vetor de arboviroses como dengue, chikungunya, Zika e febre amarela urbana. O presente trabalho teve como objetivo avaliar quantitativamente a atividade lo...

Diversidade em genes relacionados à resistência a inseticidas e ritmos biológicos em Anopheles darlingi Root 1926

Anopheles darlingi, o principal vetor de plasmódios que podem causar malária humana, está distribuído na região neotropical desde o sul do México até o sul do Brasil. Uma série de estudos vem apontando evidências sobre a existência de espécies crípticas em An. darlingi, como por exemplo popul...