# Actualités anglophones

Parasites & Vectors 20/03/21 A survey of insecticide resistance-conferring mutations in multiple targets in Anopheles sinensis populations across Sichuan, China. 1.Enayati A, Hemingway J.

Malaria management: past, present, and future. Annu Rev Entomol. 2010;55:569–91.CAS Article Google Scholar 2.WHO. World Malaria Report. Geneva. Switzerland: World Health Organization; 2019. p. 2019. PLOS 11/03/21 High pyrethroid/DDT resistance in major malaria vector Anopheles coluzzii from Niger-Delta of Nigeria is probably driven by metabolic resistance mechanisms. Abstract Entomological surveillance of local malaria vector populations is an important component of vector control and resistance management.

In this study, the resistance profile and its possible mechanisms was characterised in a field population of the major malaria vector Anopheles coluzzii from Port Harcourt, the capital of Rivers state, in the Niger-Delta Region of Nigeria. Larvae collected in Port-Harcourt, were reared to adulthood and used for WHO bioassays. Wellcome Open Res. 2020 Sep 8;5: Fitness cost of insecticide resistance on the life-traits of a Anopheles coluzzii population from the city of Yaoundé, Cameroon.

Introduction Malaria prevention mainly relies on the use of vector control measures with indoor residual spraying (IRS) and long-lasting insecticidal nets (LLINs) as the core interventions1.

THE ROYAL SOCIETY 27/05/20 ‘What I cannot create, I do not understand’: functionally validated synergism of metabolic and target site insecticide resistance. PLOS 04/03/20 Investigation of mosquito larval habitats and insecticide resistance in an area with a high incidence of mosquito-borne diseases in Jining, Shandong Province. Abstract Background To investigate mosquito larval habitats and resistance to common insecticides in areas with high incidence rates of mosquito-borne diseases in Jining, Shandong Province, and to provide a scientific basis for the future prevention and control of mosquito-borne diseases and the rational use of insecticides.

Methods and results From June to September 2018, mosquito habitat characteristics and species compositions in Jintun town were studied through a cross-sectional survey. Larvae and pupae were collected in different habitats using the standard dipping technique. Conclusion We showed that mosquito species vary across habitat type and that the mosquito larval density correlated positively with certain physicochemical characteristics in different habitats. Editor: Daniel Becker, Montana State University, UNITED STATES Received: July 11, 2019; Accepted: February 13, 2020; Published: March 4, 2020 Copyright: © 2020 Wang et al.

Introduction Materials and methods Bioassays Results. JOURNAL OF MEDICAL ENTOMOLOGY 22/11/19 Infected Mosquitoes Have Altered Behavior to Repellents: A Systematic Review and Meta-analysis. We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies.

You can change your cookie settings at any time. <a href=" Find out more</a> Skip to Main Content. Current Opinion in Insect Science Volume 34, August 2019, Behavioural adaptations of mosquito vectors to insecticide control. Infect Dis Poverty. 2019 Jul 15;8(1):64. Evidence of insecticide resistance selection in wild Anopheles coluzzii mosquitoes due to agricultural pesticide use.

PARASITES & VECTORS - 2019 - Insecticide resistance modifes mosquito response to DEET and natural repellents. UNIVERSITY OF MELBOURNE 11/04/18 The detection and significance of emerging insecticide resistance in mosquitoes. JOURNAL OF ARTHROPOD-BORNE DISEASES 27/04/19 Widespread Report of Multiple Insecticide Resistance in Anopheles gambiae s.l. Mosquitoes in Eight Communities in Southern Gombe, North-Eastern Nigeria.

VIGISALUD_GOV_PY - 2016 - Présentation Evolution by resistance insecticide selection in mosquito populations. WIN Network via YOUTUBE 17/05/17 Insecticide resistance & globalization of Aedes mosquitoes, D Fonseca_WIN international workshop. Parasites & Vectors 9(1) · December 2016 Landscape genetic structure and evolutionary genetics of insecticide resistance gene mutations in Anopheles sinensis. Nova Acta Leopoldina NF Nr.411, 165–171 (2016) Analysis of Insecticide Resistance in Mosquito Disease Vectors: From Molecular Mechanisms to Management. MALARIA JOURNAL 28/11/17 RDL mutations predict multiple insecticide resistance in Anopheles sinensis in Guangxi, China.

In insects, GABA receptors are ligand-gated chloride channels consisting of presumably the homopentameric RDL subunit encoded by the RDL gene.

RDLs mediate synapse inhibition in the central nervous system and are important targets for insecticides of widely varied structures such as cyclodienes and fipronil [14]. In this study, the RDL gene was identified in An. sinensis. The putative AsRDL protein has 557 amino acid residues and shares the common structural features with known Cys-loop ligand-gated chloride channels (Fig. 1). Similar to the finding obtained in An. funestus [18], only one GABA-receptor isoform is found in An. sinensis in this study. The RDL subunit has four transmembrane segments (M1, M2, M3 and M4). Point mutations (Ala to Ser/Gly/Asn) in RDL homologues at the site equivalent to 301 in Drosophila have been documented to provide resistance to cyclodienes and phenylpyrazoles in several species [17, 18, 19, 20, 21, 22, 23, 24, 34]. MALARIA JOURNAL 15/09/17 Modelling the impact of the long-term use of insecticide-treated bed nets on Anopheles mosquito biting time. An individual based simulation model was used to construct a population of n female mosquitoes that survive during both phases of their lifecycle, immature and adult, taking blood meals to produce viable female offspring to form the next generation.

Non-overlapping generations were considered, and a time step was defined as the update of the n individuals in the population. At each time step the mosquito population achieved its carrying capacity C. The carrying capacity was assumed to be a monotonic decreasing function of k, since carrying capacity is determined by food availability, according to the equation \begin{aligned} C=Me^{-k^2}, \end{aligned} where k is the product of the maximum proportion of individuals using bed nets and effectiveness of bed nets, and M represents the carrying capacity of the environment for mosquitoes when bed nets are not used.

For each individual mosquito the impact of the use of bed nets by humans is represented by the parameter $$z_i$$ according to. MALARIA JOURNAL 11/09/17 The influence of age on insecticide susceptibility of Anopheles arabiensis during dry and rainy seasons in rice irrigation schemes of Northern Tanzania. Malaria vector control mostly relies on indoor residual house spraying (IRS) and long-lasting insecticide-treated bed nets (LLINs) [1] and has accounted for the dramatic decline in malaria transmission over the past decade.

Malaria control and subsequently elimination are the priority of sub-Saharan African countries through national malaria control programmes and other donors [2]. In Tanzania, wide coverage and use of LLINS began in 2005 and has been a sustainable exercise to date with aid from different funders [3, 4, 5]. Insecticide resistance in Tanzania has been reported widely in the major malaria vectors Anopheles gambiae s.s., Anopheles arabiensis and Anopheles funestus [6, 7, 8] causing concern for the vector control programmes. Only four classes of insecticides are approved for use in vector control: pyrethroids (the only class used for LLIN treatment), organophosphates, carbamates and organochlorides [9]. MALARIA JOURNAL 25/07/17 Status of insecticide resistance in Anopheles mosquitoes in Ubon Ratchathani province, Northeastern Thailand.

Malaria vector control in Thailand targeting indoor resting and biting mosquitoes has contributed to reduce malaria in the country [6].

However, the increase of insecticide resistance in Anopheles mosquitoes in the Mekong region may represent a growing challenge for malaria control and elimination in the future [36]. Chemical approaches to control malaria vectors have been used for several decades in Thailand, especially insecticides for indoor residual spraying. Historically, there have only been a few published reports on insecticides resistance of primary malaria vectors and little monitoring on the susceptibility status of these mosquitoes. Between 1990 and 1997, foci of DDT resistance was detected in An. dirus s.l., An. minimus s.l. and An. maculatus in the northern part of Thailand [37]. Annu Rev Entomol. 2015 Jan 7;60:537-59. Insecticide resistance in mosquitoes: impact, mechanisms, and research directions. Parasites & Vectors 07/08/15 Comparability between insecticide resistance bioassays for mosquito vectors: time to review current methodology?

Knowing the insecticide susceptibility or resistance status is key in choosing the appropriate intervention to control any mosquito population.

Many factors influence the outcome of insecticide resistance monitoring exercises and the importance of the choice of the assay cannot be overlooked. The results from our study show that although the CDC bottle assay and WHO susceptibility test are mutually used to detect insecticide resistance, the two must not be used interchangeably because the agreement between the two is inconsistent.

This could be explained by the fact that the two assays differ in their basic setup. The WHO susceptibility assay, carried out in 125 mm length × 44 mm diameter tubes, measures 24 h mortality by exposing mosquitoes to a known standard concentration for a fixed period of time, usually 1 h. From our literature search, the WHO susceptibility assay was the more widely used assay.

Evidently missing in the CDCs setup is a 24 h holding period. Parasite Epidemiology and Control Volume 1, Issue 3, September 2016, Repellent and insecticidal efficacy of a combination of dinotefuran, pyriproxyfen and permethrin (Vectra® 3D) against Culex pipiens in dogs. Abstract Culex pipiens is an important vector of pathogens of substantial medical and veterinary importance such as Dirofilaria immitis and Dirofilaria repens or the West Nile Virus.

The control of these mosquitoes is therefore essential to control the transmission of mosquito-borne agents to humans and animals. A combination of dinotefuran, permethrin and pyriproxyfen (Vectra® 3D) has already shown its efficacy against Aedes aegypti. The aim of this study was to confirm the efficacy of this combination in repelling and killing another species of mosquito, Culex pipiens, after a single topical application to dogs. PLOS NEGLECTED TROPICAL DISEASES 01/12/16 Tracking Insecticide Resistance in Mosquito Vectors of Arboviruses: The Worldwide Insecticide resistance Network (WIN) Citation: Corbel V, Achee NL, Chandre F, Coulibaly MB, Dusfour I, Fonseca DM, et al. (2016) Tracking Insecticide Resistance in Mosquito Vectors of Arboviruses: The Worldwide Insecticide resistance Network (WIN).

PLoS Negl Trop Dis 10(12): e0005054. Editor: Roberto Barrera, Centers for Disease Control and Prevention, Puerto Rico, UNITED STATES Published: December 1, 2016 This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. PLOS 11/07/14 Insecticide Resistance Status of United States Populations of Aedes albopictus and Mechanisms Involved. Abstract Aedes albopictus (Skuse) is an invasive mosquito that has become an important vector of chikungunya and dengue viruses. Immature Ae. albopictus thrive in backyard household containers that require treatment with larvicides and when adult populations reach pest levels or disease transmission is ongoing, adulticiding is often required. To assess the feasibility of control of USA populations, we tested the susceptibility of Ae. albopictus to chemicals representing the main insecticide classes with different modes of action: organochlorines, organophosphates, carbamates, pyrethroids, insect growth regulators (IGR), naturalytes, and biolarvicides.

We characterized a susceptible reference strain of Ae. albopictus, ATM95, and tested the susceptibility of eight USA populations to five adulticides and six larvicides. We found that USA populations are broadly susceptible to currently available larvicides and adulticides. Editor: Zach N. Journal of Parasitology and Vector Biology Vol.6(1) , pp. 1-10 , January 2014 Dynamics of insecticide resistance and effect of synergists piperonyl butoxide (PBO), S.S.S-tributylphosphorotrithioate (DEF) and ethacrynic acid (ETAA or EA) on permethrin, del.

BLOG WELLCOME TRUST PERSPECTIVE 25/02/14 Gene mutation allows tracking of insecticide resistance in mosquitoes. Africa accounts for 85% of malaria cases and 90% of malaria deaths worldwide. Control strategies rely heavily on insecticide-based interventions such as Indoor Residual Spraying (IRS) and Long Lasting Insecticide Nets (LLINs). However, resistance to insecticides in mosquitoes such as Anopheles funestus is threatening the effectiveness of these tools. Wellcome Trust Senior Fellow Dr Charles Wondji from the Liverpool School of Tropical Medicine has discovered a genetic marker to track this resistance through a population. We asked him to explain his findings… BIOMED 26/02/14 Why mosquitoes resist – a new molecular marker sheds light on insecticide resistance. This guest blog is written by Vera Unwin.

With an MSc in Medical Parasitology and experience as a Parasitology Research Technician, Vera regularly writes for Bugbitten, our blog on parasites and vectors. Insecticides are fundamental to vector control programs for vector borne diseases. Malaria is one of the most dangerous of these diseases, with an estimated 627,000 deaths per year.

Reducing transmission by targeting mosquito populations is an integral strategy for controlling this disease. INTECH - FEV 2012 - Insecticides - Pest Engineering. Au sommaire notamment:Behavioral Responses of Mosquitoes to Insecticides. Edited by Farzana Perveen, ISBN 978-953-307-895-3, 538 pages, Publisher: InTech, Chapters published February 15, 2012 under CC BY 3.0 licenseDOI: 10.5772/1354. SCIENCE DAILY 23/09/10 New Technique Uncovers Hidden Insecticide Resistance in Mosquitoes. PLOS 21/02/12 Insecticide Resistance in the Dengue Vector Aedes aegypti from Martinique: Distribution, Mechanisms and Relations. PLOS - AOUT 2010 - Insecticide Control of Vector-Borne Diseases: When Is Insecticide Resistance a Problem?

Mem. Inst. Oswaldo Cruz vol.107 no.4 Rio de Janeiro June 2012 Evolution of insecticide resistance in non-target black flies (Dip. Parasites & Vectors 2012, 5:78 Insecticide resistance in Culex quinquefasciatus from Zanzibar: implications for vector control p. Rev Panam Salud Publica vol.32 no.1 Washington July 2012 Impact of environmental temperatures on resistance to organophosphate i.