{"id":478,"date":"2026-03-12T17:26:11","date_gmt":"2026-03-12T16:26:11","guid":{"rendered":"https:\/\/biotechlerncenter.iph-multisite.berta-bewegt.ch\/?page_id=478"},"modified":"2026-03-13T16:36:04","modified_gmt":"2026-03-13T15:36:04","slug":"3-la-maladie-covid-19","status":"publish","type":"page","link":"https:\/\/biotechlerncenter.interpharma.ch\/fr\/sujets\/corona-ein-virus-veraendert-die-welt\/3-la-maladie-covid-19\/","title":{"rendered":"3. La maladie COVID-19"},"content":{"rendered":"\n<p>Le coronavirus cause la maladie COVID-19\n(COVID-19 est l\u2019abr\u00e9viation de <em>Corona\nvirus disease 2019<\/em>). Mais comment le virus p\u00e9n\u00e8tre-t-il dans notre\norganisme? Et comment fait-il pour s\u2019y multiplier? Le coronavirus se transmet\nprincipalement par gouttelettes. Cela veut dire que de minuscules gouttelettes\ncontenant des virus sont projet\u00e9es dans l\u2019air lorsqu\u2019une personne infect\u00e9e\ntousse ou parle. D\u2019autres personnes les inspirent. Par ailleurs, une infection\nest possible par contact avec des objets infect\u00e9s, par exemple poign\u00e9es de\nporte, stylos, etc. Nous pouvons nous infecter si nous touchons ces objets ou\nsurfaces et que nous nous frottons ensuite les yeux ou touchons notre bouche.\nD\u00e8s que le virus p\u00e9n\u00e8tre dans notre organisme, il commence \u00e0 infecter nos cellules\net \u00e0 se multiplier. <\/p>\n\n\n\n<p><strong>Comment\nle coronavirus envahit les cellules humaines<\/strong><\/p>\n\n\n\n<p>C\u2019est\n\u00e0 l\u2019aide de la prot\u00e9ine de spicule que le virus va se lier \u00e0 la cellule h\u00f4te.\nLe virus proc\u00e8de de mani\u00e8re tr\u00e8s rus\u00e9e: un peu comme un cheval de Troie, il se camoufle,\nsa prot\u00e9ine S ressemble \u00e0 une prot\u00e9ine que la cellule humaine conna\u00eet d\u00e9j\u00e0.\nElle laisse donc le virus entrer (c\u2019est ce qu\u2019on appelle l\u2019endocytose).<\/p>\n\n\n\n<p>Une fois dans la cellule, le virus peut commencer \u00e0 agir sans se faire remarquer. Il prend le contr\u00f4le de la cellule h\u00f4te et la fait travailler pour lui. La cellule se transforme en usine \u00e0 virus. Les virus nouvellement produits sortent de la cellule (exocytose) et contaminent les cellules voisines. Le syst\u00e8me immunitaire d\u00e9tecte ce processus et d\u00e9clenche l\u2019alarme. Il d\u00e9ploie imm\u00e9diatement tout son arsenal contre l\u2019envahisseur: macrophages, lymphocytes T, plus tard aussi des anticorps qui reconnaissent et attaquent le virus et les cellules contamin\u00e9es. Nous connaissons tous les sympt\u00f4mes de cette r\u00e9action de d\u00e9fense de notre organisme: nous avons de la fi\u00e8vre, nous toussons. Les cellules mortes se retrouvent dans nos mouchoirs sous forme de morve. Dans les cas graves, des gonflements apparaissent dans les poumons, des difficult\u00e9s respiratoires et des troubles du rythme cardiaque se font sentir. Il se peut aussi que les reins cessent de fonctionner, que la tension art\u00e9rielle chute, l\u2019issue peut m\u00eame \u00eatre mortelle. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/biotechlerncenter.interpharma.ch\/wp-content\/uploads\/sites\/4\/2020\/12\/corona_virus_figure3.png\" alt=\"\" class=\"wp-image-6931\"\/><\/figure>\n\n\n\n<p>Mais il n\u2019y a pas d\u2019\u00e9volution typique de la maladie COVID-19. Dans l\u2019\u00e9tat actuel des connaissances, 80% des patient-e-s n\u2019ont pas de sympt\u00f4mes ou seulement de l\u00e9gers sympt\u00f4mes: fi\u00e8vre, toux, essoufflement, maux de gorge et de t\u00eate, perte de l\u2019odorat et du go\u00fbt. Chez 15% des patient-e-s, la maladie a une \u00e9volution grave et chez 5% si grave que des soins intensifs sont n\u00e9cessaires. Environ 1% de l\u2019ensemble des patient-e-s meurt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le coronavirus cause la maladie COVID-19 (COVID-19 est l\u2019abr\u00e9viation de Corona virus disease 2019). Mais comment le virus p\u00e9n\u00e8tre-t-il dans notre organisme? Et comment fait-il pour s\u2019y multiplier? Le coronavirus se transmet principalement par gouttelettes. Cela veut dire que de minuscules gouttelettes contenant des virus sont projet\u00e9es dans l\u2019air lorsqu\u2019une personne infect\u00e9e tousse ou parle. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":490,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"page-templates\/unterthema.php","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-478","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>3. La maladie COVID-19 - biotechlerncenter<\/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:\/\/biotechlerncenter.interpharma.ch\/themen\/corona-ein-virus-veraendert-die-welt\/erkrankung-covid-19\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"3. 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