{"id":371618,"date":"2025-02-21T22:43:03","date_gmt":"2025-02-21T22:43:03","guid":{"rendered":"https:\/\/afrikmag.com\/var\/www\/vhosts\/afrikmag.compublic_html\/?p=371618"},"modified":"2025-02-21T22:43:03","modified_gmt":"2025-02-21T22:43:03","slug":"equipe-chinoise-decouvre-nouveau-coronavirus-chauve-souris-qui-pourrait-infecter-les-humains","status":"publish","type":"post","link":"https:\/\/afrikmag.com\/var\/www\/vhosts\/afrikmag.compublic_html\/equipe-chinoise-decouvre-nouveau-coronavirus-chauve-souris-qui-pourrait-infecter-les-humains\/","title":{"rendered":"Une \u00e9quipe chinoise d\u00e9couvre un nouveau coronavirus de chauve-souris qui pourrait infecter les humains"},"content":{"rendered":"<p><span>Une \u00e9quipe chinoise a d\u00e9couvert un nouveau coronavirus de chauve-souris qui comporte un risque de transmission de l\u2019animal \u00e0 l\u2019homme car il utilise le m\u00eame r\u00e9cepteur humain que le virus responsable de la COVID-19.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span>L&rsquo;\u00e9tude a \u00e9t\u00e9 men\u00e9e par Shi Zhengli \u2013 une virologue de premier plan connue sous le nom de \u00ab Batwoman \u00bb en raison de ses recherches approfondies sur les coronavirus des chauves-souris \u2013 au laboratoire de Guangzhou, en collaboration avec des chercheurs de l&rsquo;Acad\u00e9mie des sciences de Guangzhou, de l&rsquo;Universit\u00e9 de Wuhan et de l&rsquo;Institut de virologie de Wuhan.<\/span><\/p>\n<p><span>Shi est surtout connue pour son travail \u00e0 l&rsquo;Institut de Wuhan, qui a \u00e9t\u00e9 au centre de la controverse sur les origines du Covid, une th\u00e9orie majeure sugg\u00e9rant qu&rsquo;il proviendrait d&rsquo;une fuite de laboratoire dans la ville.<\/span><\/p>\n<p><span>Bien qu&rsquo;il n&rsquo;existe pas encore de confirmation sur l&rsquo;origine du virus, certaines \u00e9tudes sugg\u00e8rent qu&rsquo;il serait apparu chez les chauves-souris et qu&rsquo;il aurait \u00e9t\u00e9 transmis \u00e0 l&rsquo;homme par l&rsquo;interm\u00e9diaire d&rsquo;un animal h\u00f4te. Shi a ni\u00e9 que l&rsquo;institut soit responsable de l&rsquo;\u00e9pid\u00e9mie.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span>La derni\u00e8re d\u00e9couverte est une nouvelle lign\u00e9e du coronavirus HKU5 identifi\u00e9e pour la premi\u00e8re fois chez la chauve-souris pipistrelle japonaise \u00e0 Hong Kong.<\/span><\/p>\n<p><span>Le nouveau virus provient du sous-genre merbecovirus, qui comprend \u00e9galement le virus responsable du syndrome respiratoire du Moyen-Orient (Mers).<\/span><\/p>\n<p><span>Le virus peut se lier \u00e0 l\u2019enzyme de conversion de l\u2019angiotensine humaine (ACE2), le m\u00eame r\u00e9cepteur utilis\u00e9 par le virus Sars-CoV-2, responsable du Covid-19, pour infecter les cellules.<\/span><\/p>\n<blockquote><p>\n<span>\u00ab Nous rapportons la d\u00e9couverte et l&rsquo;isolement d&rsquo;une lign\u00e9e distincte (lign\u00e9e 2) de HKU5-CoV, qui peut utiliser non seulement l&rsquo;ACE2 de chauve-souris mais aussi l&rsquo;ACE2 humaine et divers orthologues de l&rsquo;ACE2 de mammif\u00e8res [\u2013 g\u00e8nes trouv\u00e9s dans diff\u00e9rentes esp\u00e8ces avec une origine commune] \u00bb, ont-ils \u00e9crit dans un article publi\u00e9 dans la revue \u00e0 comit\u00e9 de lecture Cell.<\/span><\/p><\/blockquote>\n<p><span>Les chercheurs ont d\u00e9couvert que lorsque le virus \u00e9tait isol\u00e9 \u00e0 partir d\u2019\u00e9chantillons de chauve-souris, il pouvait infecter des cellules humaines ainsi que des masses de cellules ou de tissus cultiv\u00e9s artificiellement qui ressemblaient \u00e0 des organes respiratoires ou intestinaux miniaturis\u00e9s.<\/span><\/p>\n<blockquote><p>\n<span>\u00ab Les merbecovirus de chauve-souris\u2026 pr\u00e9sentent un risque \u00e9lev\u00e9 de transmission aux humains, soit par transmission directe, soit facilit\u00e9e par des h\u00f4tes interm\u00e9diaires \u00bb, ont ajout\u00e9 les chercheurs.<\/span><\/p><\/blockquote>\n<p><span>Le HKU5-CoV-2 se lie non seulement aux r\u00e9cepteurs ACE2 chez l\u2019homme, mais aussi chez de nombreuses autres esp\u00e8ces, qui pourraient toutes agir comme h\u00f4tes interm\u00e9diaires et le transmettre \u00e0 l\u2019homme.<\/span><\/p>\n<p><span>Le merbecovirus comprend quatre esp\u00e8ces distinctes \u2013 le coronavirus Mers, deux trouv\u00e9s chez les chauves-souris et un chez les h\u00e9rissons \u2013 et a \u00e9t\u00e9 ajout\u00e9 \u00e0 la liste des agents pathog\u00e8nes \u00e9mergents de l&rsquo;Organisation mondiale de la sant\u00e9 pour la pr\u00e9paration aux pand\u00e9mies l&rsquo;ann\u00e9e derni\u00e8re.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span>Plus t\u00f4t ce mois-ci, Cell a publi\u00e9 un article d\u2019une \u00e9quipe de l\u2019Universit\u00e9 de Washington \u00e0 Seattle et de l\u2019Universit\u00e9 de Wuhan qui concluait que m\u00eame si la souche HKU5 pouvait se lier aux r\u00e9cepteurs ACE2 des chauves-souris et d\u2019autres mammif\u00e8res, elle ne d\u00e9tectait pas de liaison humaine \u00ab efficace \u00bb.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une \u00e9quipe chinoise a d\u00e9couvert un nouveau coronavirus de chauve-souris qui comporte un risque de transmission de l\u2019animal \u00e0 l\u2019homme car il utilise le m\u00eame r\u00e9cepteur humain que le virus responsable de la COVID-19. &nbsp; L&rsquo;\u00e9tude a \u00e9t\u00e9 men\u00e9e par Shi Zhengli \u2013 une virologue de premier plan connue sous le nom de \u00ab Batwoman &hellip;<\/p>\n","protected":false},"author":45,"featured_media":371619,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[189118,7020],"tags":[201481,161068,201482],"class_list":["post-371618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-societe","tag-chauve-souris","tag-coronavirus","tag-equipe-chinoise"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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