{"id":343930,"date":"2022-10-20T09:57:22","date_gmt":"2022-10-20T09:57:22","guid":{"rendered":"https:\/\/afrikmag.com\/var\/www\/vhosts\/afrikmag.compublic_html\/?p=343930"},"modified":"2022-10-20T09:57:41","modified_gmt":"2022-10-20T09:57:41","slug":"scientifiques-developpent-une-nouvelle-souche-covid-plus-mortelle-en-laboratoire","status":"publish","type":"post","link":"https:\/\/afrikmag.com\/var\/www\/vhosts\/afrikmag.compublic_html\/scientifiques-developpent-une-nouvelle-souche-covid-plus-mortelle-en-laboratoire\/","title":{"rendered":"Des scientifiques d\u00e9veloppent une nouvelle souche Covid plus mortelle en laboratoire"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Des scientifiques am\u00e9ricains ont d\u00e9velopp\u00e9 une nouvelle souche mortelle de Covid dans un laboratoire et disent que la variante mutante \u2013 qui est un hybride d&rsquo;Omicron et du virus original de Wuhan \u2013 a tu\u00e9 80% des souris infect\u00e9es \u00e0 l&rsquo;Universit\u00e9 de Boston.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans la nouvelle recherche, une \u00e9quipe de scientifiques de Boston et de Floride a extrait la prot\u00e9ine de pointe d&rsquo;Omicron &#8211; la structure unique qui se lie et envahit les cellules humaines. Les scientifiques ont attach\u00e9 la pointe d&rsquo;Omicron \u00e0 la souche originale de type sauvage qui est apparue pour la premi\u00e8re fois \u00e0 Wuhan au d\u00e9but de la pand\u00e9mie.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cependant, lorsqu&rsquo;un groupe similaire de rongeurs a \u00e9t\u00e9 expos\u00e9 \u00e0 la souche standard d&rsquo;Omicron, ils ont tous surv\u00e9cu et n&rsquo;ont ressenti que des sympt\u00f4mes \u00ab\u00a0<em>l\u00e9gers<\/em>\u00ab\u00a0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les scientifiques ont \u00e9galement infect\u00e9 des cellules humaines avec la variante hybride et ont d\u00e9couvert qu&rsquo;elle \u00e9tait cinq fois plus infectieuse qu&rsquo;Omicron. Cela sugg\u00e8re que le virus covid artificiel pourrait \u00eatre la forme la plus contagieuse \u00e0 ce jour.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9crivant dans le rapport annuel NEIDL de l&rsquo;Universit\u00e9 de Boston, les scientifiques ont d\u00e9clar\u00e9: \u00ab\u00a0<em>Chez \u2026 les souris, alors qu&rsquo;Omicron provoque une infection b\u00e9nigne et non mortelle, le virus porteur d&rsquo;Omicron S inflige une maladie grave avec un taux de mortalit\u00e9 de 80%.\u00a0\u00bb<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp;Les chercheurs ont d\u00e9clar\u00e9 qu&rsquo;il a \u00e9t\u00e9 signal\u00e9 que si la prot\u00e9ine de pointe est responsable de l&rsquo;infectivit\u00e9, des modifications d&rsquo;autres parties de sa structure d\u00e9terminent sa mortalit\u00e9.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les scientifiques ont \u00e9galement examin\u00e9 l&rsquo;effet des diff\u00e9rentes souches sur les cellules pulmonaires humaines cultiv\u00e9es en laboratoire. Ils ont not\u00e9 que l&rsquo;une des limites de leur \u00e9tude \u00e9tait la race sp\u00e9cifique de souris utilis\u00e9e, car d&rsquo;autres types de souris ressemblent davantage aux humains. Le type de souris utilis\u00e9 dans l&rsquo;\u00e9tude a \u00e9t\u00e9 d\u00e9velopp\u00e9 sp\u00e9cifiquement pour examiner l&rsquo;infection s\u00e9v\u00e8re de Covid, mais actuellement, aucun mod\u00e8le de souris ne reproduit tous les aspects de Covid chez l&rsquo;homme.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le laboratoire des laboratoires nationaux des maladies infectieuses \u00e9mergentes de l&rsquo;Universit\u00e9 de Boston est l&rsquo;un des 13 laboratoires de niveau 4 de bios\u00e9curit\u00e9 aux \u00c9tats-Unis, des laboratoires sp\u00e9ciaux autoris\u00e9s \u00e0 manipuler les agents pathog\u00e8nes les plus dangereux. Il existe \u00e9galement des installations au Texas, \u00e0 Atlanta et \u00e0 Manhattan, au Kansas.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des scientifiques am\u00e9ricains ont d\u00e9velopp\u00e9 une nouvelle souche mortelle de Covid dans un laboratoire et disent que la variante mutante \u2013 qui est un hybride d&rsquo;Omicron et du virus original de Wuhan \u2013 a tu\u00e9 80% des souris infect\u00e9es \u00e0 l&rsquo;Universit\u00e9 de Boston. Dans la nouvelle recherche, une \u00e9quipe de scientifiques de Boston et de &hellip;<\/p>\n","protected":false},"author":37,"featured_media":343947,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[371,7020],"tags":[170682,16300,1987],"class_list":["post-343930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sante","category-societe","tag-covid","tag-laboratoire","tag-scientifiques"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Des scientifiques d\u00e9veloppent une nouvelle souche Covid plus mortelle en laboratoire<\/title>\n<meta name=\"description\" content=\"Des scientifiques am\u00e9ricains ont d\u00e9velopp\u00e9 une nouvelle souche mortelle de Covid dans un laboratoire et disent que la variante mutante\" \/>\n<meta name=\"robots\" content=\"index, follow, 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