{"id":18523,"date":"2024-10-18T10:32:33","date_gmt":"2024-10-18T09:32:33","guid":{"rendered":"https:\/\/targetmalaria.org\/virtual-press-room\/press-releases\/study-of-wild-type-mosquitoes-in-burkina-faso-discovers-new-signs-of-insecticide-resistance\/"},"modified":"2025-02-04T15:28:39","modified_gmt":"2025-02-04T15:28:39","slug":"study-of-wild-type-mosquitoes-in-burkina-faso-discovers-new-signs-of-insecticide-resistance","status":"publish","type":"press-release","link":"https:\/\/targetmalaria.org\/fr\/espace-presse-virtuel\/communiques-de-presse\/study-of-wild-type-mosquitoes-in-burkina-faso-discovers-new-signs-of-insecticide-resistance\/","title":{"rendered":"Une \u00e9tude sur les moustiques sauvages au Burkina Faso r\u00e9v\u00e8le de nouveaux signes de r\u00e9sistance aux insecticides"},"content":{"rendered":"\n<p><strong>R\u00e9sum\u00e9<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Des chercheurs de Target Malaria ont publi\u00e9 de nouvelles donn\u00e9es sur la g\u00e9nomique des moustiques sauvages vecteurs du paludisme au Burkina Faso dans Malaria Journal : \u00ab\u00a0<a href=\"https:\/\/malariajournal.biomedcentral.com\/articles\/10.1186\/s12936-024-05106-7\">Whole-genome sequencing of major malaria vectors reveals the evolution of new insecticide resistance variants in a longitudinal study in Burkina Faso<\/a> \u00bb.<\/li>\n\n\n\n<li>L&rsquo;un des principaux r\u00e9sultats a \u00e9t\u00e9 l\u2019identification de nouvelles mutations \u00e9mergentes dans les g\u00e8nes associ\u00e9s \u00e0 la r\u00e9sistance aux insecticides, en particulier les insecticides utilis\u00e9s dans les moustiquaires impr\u00e9gn\u00e9es d&rsquo;insecticide de longue dur\u00e9e d\u2019action (MILDA) et les pulv\u00e9risations intradomiciliaires d&rsquo;insecticide \u00e0 effet r\u00e9manent (PID).<\/li>\n\n\n\n<li><em>Anopheles coluzzii <\/em>s&rsquo;est av\u00e9r\u00e9 \u00eatre l&rsquo;esp\u00e8ce la plus pr\u00e9dominante dans les villages \u00e9chantillonn\u00e9s au Burkina Faso, repr\u00e9sentant 53% des \u00e9chantillons, suivi par <em>Anopheles gambiae sensu stricto (s.s.) <\/em>avec 39%, alors qu&rsquo;<em> arabiensis <\/em>ne repr\u00e9sentait que 8% des \u00e9chantillons collect\u00e9s.<\/li>\n<\/ul>\n\n<p><strong>OUAGADOUGOU, Burkina Faso, 17 October 2024 \u2013 <\/strong>A new scientific paper authored by a team of researchers led by Dr. Mahamadi Kientega, a medical entomologist at the Institut de Recherche en Sciences de la Sant\u00e9 (IRSS) in Burkina Faso, was published in Malaria Journal. Titled \u201c<a href=\"https:\/\/malariajournal.biomedcentral.com\/articles\/10.1186\/s12936-024-05106-7\">Whole-genome sequencing of major malaria vectors reveals the evolution of new insecticide resistance variants in a longitudinal study in Burkina Faso<\/a>\u201d, the publication is the result of a collaborative study by the Institut de Recherche en Sciences de la Sant\u00e9-IRSS (Institute of Research in Health Sciences) in Bobo-Dioulasso, MalariaGEN Vector Observatory and Target Malaria. Between 2012 and 2017, mosquito samples were collected in three villages of Burkina Faso: Bana, Souroukoudinga and Pala. Ils ont ensuite s\u00e9quenc\u00e9 le g\u00e9nome de ces moustiques pour \u00e9tudier l\u2019\u00e9volution des variantes associ\u00e9es \u00e0 la r\u00e9sistance aux insecticides.<\/p>\n\n<p>L&rsquo;une des principales d\u00e9couvertes de l&rsquo;\u00e9tude est l&rsquo;identification de nouvelles mutations dans les g\u00e8nes impliqu\u00e9s dans la r\u00e9sistance aux insecticides chez les moustiques <em>anoph\u00e8les<\/em>, principaux vecteurs du paludisme en Afrique de l&rsquo;Ouest, et de nouveaux m\u00e9canismes potentiels de r\u00e9sistance, soulignant l&rsquo;importance de la surveillance g\u00e9nomique. Ces mutations ont \u00e9t\u00e9 observ\u00e9es dans les g\u00e8nes du canal sodium voltage-d\u00e9pendant (VGSC) et de l&rsquo;ac\u00e9tylcholinest\u00e9rase (ACE1), qui sont des cibles cl\u00e9s pour les insecticides utilis\u00e9s dans les moustiquaires impr\u00e9gn\u00e9es d&rsquo;insecticide longue dur\u00e9e d\u2019action (MILDA) et les pulv\u00e9risations intra-domiciliaires d&rsquo;insecticide \u00e0 effet r\u00e9manent (PID). Des signaux de s\u00e9lection positive ont \u00e9t\u00e9 observ\u00e9s dans ces g\u00e8nes, ce qui sugg\u00e8re un r\u00f4le potentiel dans l&rsquo;adaptation des moustiques aux outils de lutte antivectorielle. La r\u00e9sistance aux insecticides est une menace majeure pour le d\u00e9veloppement de solutions visant \u00e0 \u00e9liminer le paludisme, car elle r\u00e9duit l&rsquo;efficacit\u00e9 de deux des principales mesures de lutte antivectorielle qui ont permis de r\u00e9duire l&rsquo;incidence du paludisme dans les pays end\u00e9miques : les moustiquaires et les pulv\u00e9risations d&rsquo;insecticides.<\/p>\n\n<p>\u00ab\u00a0Aujourd&rsquo;hui plus que jamais, il est crucial de comprendre la variation g\u00e9nomique des moustiques afin de surveiller et comprendre comment ce champion de l&rsquo;\u00e9volution biologique continue d&rsquo;\u00e9chapper aux strat\u00e9gies de lutte antivectorielle. En r\u00e9ponse \u00e0 la couverture \u00e9lev\u00e9e des moustiquaires impr\u00e9gn\u00e9es, le comportement de piq\u00fbre des moustiques a chang\u00e9 dans plusieurs r\u00e9gions d&rsquo;Afrique et nous devons commencer \u00e0 envisager de nouveaux outils de lutte antivectorielle efficaces et durables\u00a0\u00bb, d\u00e9clare le Dr Mahamadi Kientega, chercheur \u00e0 l&rsquo;Institut de recherche en sciences de la sant\u00e9 (IRSS), au Burkina Faso.<\/p>\n\n<p><strong>Le r\u00f4le central de la surveillance g\u00e9nomique<\/strong><\/p>\n\n<p>Les moustiquaires impr\u00e9gn\u00e9es d&rsquo;insecticide de longue dur\u00e9e d\u2019action (MILDA) et la pulv\u00e9risation intradomiciliaire d&rsquo;insecticide \u00e0 effet r\u00e9manent (PID) constituent la pierre angulaire des interventions actuelles de lutte contre le paludisme. <strong>En 2023, le <\/strong><a href=\"https:\/\/www.theglobalfund.org\/en\/\"><strong>Fonds mondial<\/strong><\/a><strong> a distribu\u00e9 227 millions de moustiquaires aux familles et pulv\u00e9ris\u00e9 7,9 millions de foyers pour pr\u00e9venir les cas de paludisme<\/strong>. Selon le <a href=\"https:\/\/www.who.int\/publications\/i\/item\/9789240086173\">Rapport sur le paludisme dans le monde<\/a>, on estime que 800 millions de cas de paludisme et 1,9 millions de d\u00e9c\u00e8s dus au paludisme ont \u00e9t\u00e9 \u00e9vit\u00e9s au cours de la p\u00e9riode 2000-2022.<\/p>\n\n<p>Toutefois, les progr\u00e8s en mati\u00e8re de r\u00e9duction de la mortalit\u00e9 et de la morbidit\u00e9 dues au paludisme se sont interrompus et le monde n&rsquo;est pas sur la bonne voie pour atteindre les <a href=\"https:\/\/www.who.int\/data\/gho\/data\/themes\/topics\/sdg-target-3_3-communicable-diseases\">objectifs de 2030<\/a> en mati\u00e8re de r\u00e9duction de la morbidit\u00e9 et de mortalit\u00e9 dues au paludisme. Le d\u00e9ploiement intensif d&rsquo;outils de lutte contre les vecteurs du paludisme \u00e0 base d&rsquo;insecticides a \u00e9t\u00e9 efficace, mais il a entra\u00een\u00e9 l&rsquo;\u00e9volution rapide de ph\u00e9notypes r\u00e9sistants aux insecticides comme les organophosphor\u00e9s ou les pyr\u00e9thro\u00efdes.<\/p>\n\n<p>Cette \u00e9tude collective sur la g\u00e9nomique des moustiques impliquant plusieurs partenaires de recherche souligne l&rsquo;<strong>importance de la surveillance mol\u00e9culaire des variants ou mutations de r\u00e9sistance aux insecticides existants, des nouveaux variants, ainsi que la compr\u00e9hension des processus \u00e9volutifs sous-jacents<\/strong>.<\/p>\n\n<p>\u00ab\u00a0La d\u00e9tection et la surveillance de la r\u00e9sistance aux insecticides nous permettront d&rsquo;adapter notre strat\u00e9gie de lutte contre le paludisme, d&rsquo;anticiper la perte de vitesse des interventions conventionnelles de lutte contre les vecteurs de la maladie et de promouvoir des alternatives durables et innovantes, telles que les moustiques g\u00e9n\u00e9tiquement modifi\u00e9s, les symbiotes naturels et de nouveaux compos\u00e9s insecticides\u00a0\u00bb, ajoute Dr Kientega.<\/p>\n\n<p><strong>Mieux comprendre la dynamique des populations de vecteurs du paludisme <\/strong><\/p>\n\n<p>Dans le cadre du <a href=\"https:\/\/www.malariagen.net\/project\/ag1000g\/\">projet <em>Anopheles gambiae <\/em>1000 genomes (Ag1000G<\/a>), le g\u00e9nome des \u00e9chantillons compos\u00e9s de 1409 moustiques <em>Anopheles gambiae sensu lato <\/em>(s.l.) (978 femelles et 431 m\u00e2les) a \u00e9t\u00e9 s\u00e9quenc\u00e9. Les r\u00e9sultats fournissent une analyse compl\u00e8te de la diversit\u00e9 g\u00e9n\u00e9tique des esp\u00e8ces du complexe <em>Anopheles <\/em><em>gambiae<\/em>, avec un accent particulier sur <em>An. gambiae s.s.<\/em>, <em>An. coluzzii<\/em>, et <em>An. arabiensis. <\/em>Les r\u00e9sultats de l&rsquo;\u00e9tude mettent en \u00e9vidence des structures de population distinctes dans diff\u00e9rentes r\u00e9gions, ce qui est important pour comprendre comment la r\u00e9sistance se propage et \u00e9volue g\u00e9ographiquement.<\/p>\n\n<p><em>Anopheles coluzzii <\/em>est l&rsquo;esp\u00e8ce pr\u00e9dominante dans les trois villages o\u00f9 des moustiques ont \u00e9t\u00e9 collect\u00e9s. <em>An. coluzzii <\/em>repr\u00e9sente 53% des \u00e9chantillons, suivi par <em>An. gambiae s.s. <\/em>avec 39%, alors qu&rsquo;<em>An. arabiensis <\/em>ne repr\u00e9sente que 8% des \u00e9chantillons collect\u00e9s. <em>An. coluzzii <\/em>reste l&rsquo;esp\u00e8ce pr\u00e9dominante \u00e0 Bana (84%) et Souroukoudinga (61%) tandis qu&rsquo;<em>An. gambiae s.s. <\/em>est pr\u00e9dominant \u00e0 Pala (71%). Deux hybrides d&rsquo;<em>An. gambiae s.s. <\/em>et d&rsquo;<em>An. coluzzii <\/em>ont \u00e9galement \u00e9t\u00e9 identifi\u00e9s.<\/p>\n\n<p>Les analyses de la diversit\u00e9 g\u00e9n\u00e9tique chez <em>An. gambiae s.s. <\/em>et <em>An. coluzzii <\/em>semblent indiquer une faible diff\u00e9renciation g\u00e9n\u00e9tique et un flux de g\u00e8nes continu, ce qui signifie que ces deux esp\u00e8ces sont \u00e9troitement li\u00e9es et s&rsquo;accouplent souvent l&rsquo;une \u00e0 l&rsquo;autre, les variants ou mutations circulant facilement entre les deux (y compris la r\u00e9sistance aux insecticides). Au contraire, <em>An. arabiensis <\/em>pr\u00e9sentait une plus grande diff\u00e9renciation g\u00e9n\u00e9tique par rapport aux autres esp\u00e8ces, ce qui sugg\u00e8re un flux de g\u00e8nes limit\u00e9.<\/p>\n\n<p><\/p>\n","protected":false},"featured_media":18513,"template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","featured_image_focal_point":[]},"profile_tax":[],"class_list":["post-18523","press-release","type-press-release","status-publish","has-post-thumbnail","hentry","country-burkina-faso"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Une \u00e9tude sur les moustiques sauvages au Burkina Faso r\u00e9v\u00e8le de nouveaux signes de r\u00e9sistance aux insecticides - Target Malaria<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/targetmalaria.org\/fr\/espace-presse-virtuel\/communiques-de-presse\/study-of-wild-type-mosquitoes-in-burkina-faso-discovers-new-signs-of-insecticide-resistance\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une \u00e9tude sur les moustiques sauvages au Burkina Faso r\u00e9v\u00e8le de nouveaux signes de r\u00e9sistance aux insecticides - Target Malaria\" \/>\n<meta property=\"og:description\" content=\"R\u00e9sum\u00e9 OUAGADOUGOU, Burkina Faso, 17 October 2024 \u2013 A new scientific paper authored by a team of researchers led by Dr. Mahamadi Kientega, a medical entomologist at the Institut de Recherche en Sciences de la Sant\u00e9 (IRSS) in Burkina Faso, was published in Malaria Journal. 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