Résistance aux pyrethrinoides de Aedes aegypti. INTECH - 2012 - Insecticides - Basic and Other Applications. Au sommaire: The Pyrethroid Knockdown Resistance. INTECH - FEV 2012 - The Pyrethroid Knockdown Resistance. Insect Science, Volume 13, Number 3, June 2006 Pyrethroid resistance in mosquitoes. Abstract Repeated blood feedings throughout their life span have made mosquitoes ideal transmitters of a wide variety of disease agents.
Vector control is a very important part of the current global strategy for the control of mosquito-associated diseases and insecticide application is the most important component in this effort. Pyrethroids, which account for 25% of the world insecticide market, are currently the most widely used insecticides for the indoor control of mosquitoes and are the only chemical recommended for the treatment of mosquito nets, the main tool for preventing malaria in Africa.
SCIENTIFIC REPORTS 01/10/20 New insecticide screening platforms indicate that Mitochondrial Complex I inhibitors are susceptible to cross-resistance by mosquito P450s that metabolise pyrethroids. Reagents Diethoxyfluoroscein (DEF) was purchased from Cypex Ltd, UK (www.cypex.co.uk). β-Nicotinamide adenine dinucleotide phosphate (NADP+) was purchased from Melford Laboratories Ltd, HPLC solvents from Fisher Scientific UK.
Insecticides and all other reagents were supplied by Sigma Aldrich unless indicated otherwise. Insecticide metabolism assays P450 activity is dependent on electrons donated by NADPH via CPR, thus metabolism was assessed by measuring insecticide turnover (percentage substrate depletion) in the presence or absence of NADPH. J Insect Sci - 2020 Jul - Low Levels of Pyrethroid Resistance in Hybrid Offspring of a Highly Resistant and a More Susceptible Mosquito Strain. Skip to Main Content Advertisement Search Close Advanced Search Search Menu Skip Nav Destination Article Navigation.
Résumé traduit : La forte prévalence de l'utilisation des pyréthroïdes comme insecticides de santé publique a entraîné l'évolution de la résistance aux pyréthroïdes dans de nombreuses populations d'Aedes aegypti (Linnaeus) (Diptera: Culicidae), dans toute son aire de répartition mondiale. La résistance aux insecticides est souvent corrélée avec un coût énergétique associé. Ces résultats suggèrent que les hybrides de moustiques sensibles et résistants à la perméthrine ont un avantage supplémentaire par rapport aux moustiques plus sensibles lorsqu'ils sont exposés à la perméthrine. Cela explique la propagation rapide de la résistance à la perméthrine qui a été observée à plusieurs reprises sur le terrain. – guatemalt
GENES GENOMES GENETICS 18/05/20 Genomic Variant Analyses in Pyrethroid Resistant and Susceptible Malaria Vector, Anopheles sinensis. PEST MANAGEMENT SCIENCE 26/12/17 First evidence of resistance to pyrethroid insecticides in Italian Aedes albopictus populations 26 years after invasion. More than half of the human population is at risk of infection with Aedes‐borne viruses (e.g dengue, yellow fever, chikungunya and Zika viruses), which cause thousands of deaths per year and potentially millions of debilitating and economically damaging illnesses.1 Although these arboviral diseases are mostly endemic in the tropics, outbreaks have occurred in temperate regions, mainly mediated by Aedes aegypti, a major tropical vector species, which was reported repeatedly in Mediterranean countries before 1950 and only sporadically afterwards (e.g. on the northern coast of the Black Sea since 2008).2, 3 In Europe, Ae. albopictus was first reported in 1979 in Albania21 and in 1990 in Italy22 and is now established in 12 countries.
Pyrethroids are the only chemicals allowed for mosquito adulticide in Europe.28-30 The most commonly used pyrethroids are α‐cypermethrin, permethrin and deltamethrin, sometimes in combination with the synergist piperonyl butoxide (PBO). MALARIA JOURNAL 11/04/19 Modification of contact avoidance behaviour associated with pyrethroid resistance in Anopheles sinensis (Diptera: Culicidae) PLOS 22/02/12 Etude ayant subi une rétraction : Resistance to DDT and Pyrethroids and Increased kdr Mutation Frequency in An. gambiae after the Implementation of Permethrin-Treated Nets in Senegal. PLOS 20/09/17 Pyrethroid resistance alters the blood-feeding behavior in Puerto Rican Aedes aegypti mosquitoes exposed to treated fabric.
Abstract Emerging insecticide resistance is a major issue for vector control.
It decreases the effectiveness of insecticides, thereby requiring greater quantities for comparable control with a net increase in risk of disease resurgence, product cost, and damage risk to the ecosystem. Pyrethroid resistance has been documented in Puerto Rican populations of Aedes aegypti (L.) mosquitoes. In this study, topical toxicity of five insecticides (permethrin, etofenprox, deltamethrin, DDT, transfluthrin) was determined for susceptible (Orlando—ORL) and resistant (Puerto Rico—PR) strains of Ae. aegypti. Resistance ratios were calculated using LD50 values, and high resistance ratios for permethrin (112) and etofenprox (228) were observed for the Puerto Rico strain. Author summary Aedes aegypti is a competent vector of mosquito-borne diseases and is the primary transmitter of yellow fever, zika, chikungunya, and dengue viruses. Editor: Charles Apperson, North Carolina State University, UNITED STATES.
Center for Strategic & International Studies via YOUTUBE 09/12/14 A Strategic Approach to Malaria-Closing Panel: The Threat of Artemisinin and Pyrethroid Resistance. PLOS 18/03/14 The Impact of Pyrethroid Resistance on the Efficacy of Insecticide-Treated Bed Nets against African Anopheline Mosquitoes: Systematic Review and Meta-Analysis. Parasites & Vectors 06/12/13 The dynamics of pyrethroid resistance in Anopheles arabiensis from Zanzibar and an assessment of the underlying genetic basis.
While national malaria control programmes targeting indoor resting/biting mosquitoes have enjoyed success at reducing malaria in recent years, this success has brought with it many challenges for the future of vector control including: a) the selection of physiological resistance, b) a change in Anopheles biting and resting habits and c) shifts in the composition of vector species.
The evidence presented previously and in this study suggests that at least two of these are threatening malaria control in Zanzibar. Anopheles arabiensis has supplanted An. gambiae s.s. as the major vector in many parts of East Africa where the two species are sympatric[36, 37]. In the 1960s, it was reported that An. arabiensis had replaced An. gambiae s.s. as the major vector on Zanzibar following DDT spraying as part of the Global Malaria Eradication Programme although by the 1990s, An. gambiae s.s. had re-established itself as the main vector on Zanzibar. Parasites & Vectors 2013 6:229 DDT and pyrethroid resistance in Anopheles arabiensis from South Africa. 1.World Health Organization: Global Plan for Insecticide Resistance Management in Malaria Vectors. 2012 Google Scholar 2.Coosemans M, Carnevale P: Malaria vector control: a critical review on chemical methods and insecticides.
Ann Soc Belg Med Trop. 1995, 75: 13-31.CAS PubMed Google Scholar 3.Liu N, Xu Q, Zhu F, Zhang L: Pyrethroid resistance in mosquitoes. Insect Sci. 2006, 13: 159-166. 10.1111/j.1744-7917.2006.00078.x.Article Google Scholar 4.Hemingway J, Hawkes NJ, McCarroll L, Ranson H: The molecular basis of insecticide resistance in mosquitoes.
Insect Biochem Mol Biol. 2004, 34: 653-665. 10.1016/j.ibmb.2004.03.018.CAS Article PubMed Google Scholar 5.Bass C, Nikou D, Donnelly MJ, Williamson MS, Ranson H, Ball A, Vontas J, Field LM: Detection of knockdown resistance (kdr) mutations in Anopheles gambiae: a comparison of two new high-throughput assays with existing methods. BMC 01/03/15 The recent escalation in strength of pyrethroid resistance in Anopheles coluzzi in West Africa is linked to increased expression of multiple gene families. PLOS 18/03/14 The Impact of Pyrethroid Resistance on the Efficacy of Insecticide-Treated Bed Nets against African Anopheline Mosquitoes: Systematic Review and Meta-Analysis.
Abstract Background Pyrethroid insecticide-treated bed nets (ITNs) help contribute to reducing malaria deaths in Africa, but their efficacy is threatened by insecticide resistance in some malaria mosquito vectors.
We therefore assessed the evidence that resistance is attenuating the effect of ITNs on entomological outcomes. Methods and Findings We included laboratory and field studies of African malaria vectors that measured resistance at the time of the study and used World Health Organization–recommended impregnation regimens. Conclusions This meta-analysis found that ITNs are more effective than UTNs regardless of resistance.
Please see later in the article for the Editors' Summary Editors' Summary Every year more than 200 million cases of malaria occur worldwide, and more than 600,000 people, mostly children living in sub-Saharan Africa, die from this parasitic infection. PLOS 08/06/10 High Level of Pyrethroid Resistance in an Anopheles funestus Population of the Chokwe District in Mozambique. Abstract Background.