{"id":10644,"date":"2025-10-15T19:56:50","date_gmt":"2025-10-15T17:56:50","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/restrictions-liees-au-covid-19-liees-au-declin-de-limmunite-contre-les-infections-infantiles\/"},"modified":"2025-10-15T19:56:54","modified_gmt":"2025-10-15T17:56:54","slug":"restrictions-liees-au-covid-19-liees-au-declin-de-limmunite-contre-les-infections-infantiles","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/restrictions-liees-au-covid-19-liees-au-declin-de-limmunite-contre-les-infections-infantiles\/","title":{"rendered":"Restrictions li\u00e9es au COVID-19 li\u00e9es au d\u00e9clin de l\u2019immunit\u00e9 contre les infections infantiles"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/baby-thermometer.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2025\/baby-thermometer.jpg\" data-sub-html=\"Credit: Pixabay\/CC0 Public Domain\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Les scientifiques ont d\u00e9couvert un lien entre les mesures de contr\u00f4le du COVID-19 et une augmentation des infections graves chez les enfants suite \u00e0 la pand\u00e9mie.<\/p>\n<p>Les r\u00e9sultats, issus d&rsquo;une vaste \u00e9tude europ\u00e9enne dirig\u00e9e par des chercheurs de l&rsquo;Imperial, sugg\u00e8rent que les interventions non pharmaceutiques (NPI), notamment les confinements, les fermetures d&rsquo;\u00e9coles et la distanciation sociale, pourraient avoir retard\u00e9 par inadvertance le d\u00e9veloppement de l&rsquo;immunit\u00e9 des jeunes enfants contre des maladies infectieuses sp\u00e9cifiques, les laissant plus vuln\u00e9rables \u00e0 des maladies graves.<\/p>\n<p>Les chercheurs expliquent que m\u00eame si cet impact \u00e9tait pr\u00e9vu pour les infections virales (telles que la grippe et le VRS), une recrudescence d\u2019autres infections, notamment l\u2019infection bact\u00e9rienne Strep A, n\u2019\u00e9tait pas attendue.<\/p>\n<p>Les auteurs conseillent de peser soigneusement l\u2019impact des restrictions sur les enfants lors de futures pand\u00e9mies et soulignent l\u2019importance du d\u00e9veloppement et de la fourniture de vaccins pour r\u00e9duire l\u2019impact des infections graves dans tous les groupes d\u2019\u00e2ge.<\/p>\n<p>Les r\u00e9sultats sont publi\u00e9s dans la revue <i>R\u00e9seau JAMA ouvert<\/i>.<\/p>\n<p>Le professeur agr\u00e9g\u00e9 Tom Parks du D\u00e9partement des maladies infectieuses de l&rsquo;Imperial, co-auteur principal de l&rsquo;\u00e9tude, a d\u00e9clar\u00e9 : \u00ab Pendant la pand\u00e9mie de COVID-19, il y avait une \u00e9norme incertitude quant \u00e0 la propagation et \u00e0 la gravit\u00e9 d&rsquo;une nouvelle maladie et des d\u00e9cisions difficiles ont d\u00fb \u00eatre prises pour prot\u00e9ger les groupes vuln\u00e9rables, ainsi que pour maintenir le service de sant\u00e9. cela a sans aucun doute sauv\u00e9 d\u2019innombrables vies, r\u00e9duit l\u2019impact sur les syst\u00e8mes de sant\u00e9, y compris le NHS, et donn\u00e9 aux pays le temps de d\u00e9ployer des programmes de vaccination.<\/p>\n<p>\u00ab\u00a0Cependant, notre \u00e9tude montre qu&rsquo;ils ont \u00e9galement perturb\u00e9 la fa\u00e7on dont les enfants ont d\u00e9velopp\u00e9 leur immunit\u00e9 au cours de ces premi\u00e8res ann\u00e9es critiques. Les enfants \u00e2g\u00e9s de 3 \u00e0 4 ans test\u00e9s pour l&rsquo;immunit\u00e9 \u00e0 Strep A apr\u00e8s la pand\u00e9mie avaient environ un an de retard sur les enfants test\u00e9s avant la pand\u00e9mie. Cette diff\u00e9rence d&rsquo;immunit\u00e9 semble avoir contribu\u00e9 \u00e0 l&rsquo;augmentation alarmante des infections graves \u00e0 Strep A observ\u00e9es \u00e0 travers l&rsquo;Europe en 2022 et 2023.\u00a0\u00bb<\/p>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2025\/covid-19-linked-to-dec.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2025\/covid-19-linked-to-dec.jpg\" data-sub-html=\"Aggregate Reactivity to Influenza Viruses and Common Cold Coronaviruses. Credit: &lt;i&gt;JAMA Network Open&lt;\/i&gt; (2025). DOI:10.1001\/jamanetworkopen.2025.37808\">\n<figure class=\"article-img text-center\">\n            <img decoding=\"async\" src=\"https:\/\/rvh-synergie.org\/actualites\/wp-content\/uploads\/2025\/10\/1760551010_513_Restrictions-liees-au-COVID-19-liees-au-declin-de-limmunite-contre.jpg\" alt=\"Le COVID-19 est li\u00e9 au d\u00e9clin de l\u2019immunit\u00e9 contre les infections infantiles potentiellement mortelles\" title=\"R\u00e9activit\u00e9 globale aux virus de la grippe et aux coronavirus du rhume. Cr\u00e9dit : JAMA Network Open (2025). DOI:10.1001\/jamanetworkopen.2025.37808\"><br \/>\n                     <\/figure>\n<\/p><\/div>\n<\/div>\n<h2>Infections \u00e0 streptocoque A<\/h2>\n<p>Le streptocoque A (streptocoque du groupe A) est un type courant de bact\u00e9rie qui provoque g\u00e9n\u00e9ralement des infections de la gorge et la scarlatine. Bien que la plupart des infections soient b\u00e9nignes, dans de rares cas, le streptocoque A peut provoquer des infections invasives pouvant \u00eatre mortelles. Chaque ann\u00e9e, environ un demi-million de personnes, dont de nombreux enfants et jeunes, meurent dans le monde \u00e0 cause d&rsquo;infections graves \u00e0 Strep A.<\/p>\n<p>Des recherches ant\u00e9rieures ont montr\u00e9 que m\u00eame si les taux d\u2019infections \u00e0 Strep A ont chut\u00e9 de fa\u00e7on spectaculaire pendant la pand\u00e9mie, de nombreux pays ont enregistr\u00e9 une augmentation des taux d\u2019infection une fois les restrictions lev\u00e9es.<\/p>\n<p>Dans la derni\u00e8re \u00e9tude, l&rsquo;\u00e9quipe a examin\u00e9 les r\u00e9ponses immunitaires de 452 enfants \u00e2g\u00e9s de 0 \u00e0 4 ans dans 10 pays europ\u00e9ens qui ont particip\u00e9 \u00e0 deux \u00e9tudes : PERFORM et DIAMONDS.<\/p>\n<p>Ils ont constat\u00e9 que les enfants \u00e2g\u00e9s de 3 \u00e0 4 ans expos\u00e9s aux NPI pendant la pand\u00e9mie pr\u00e9sentaient des niveaux d\u2019anticorps contre le streptocoque A significativement inf\u00e9rieurs \u00e0 ceux des enfants du m\u00eame \u00e2ge \u00e9chantillonn\u00e9s avant la pand\u00e9mie. Les r\u00e9sultats correspondent exactement au groupe d\u2019\u00e2ge qui a connu la plus forte augmentation des infections \u00e0 Strep A potentiellement mortelles apr\u00e8s la suppression des NPI en Angleterre.<\/p>\n<p>Les chercheurs ont \u00e9galement constat\u00e9 des retards similaires dans l\u2019immunit\u00e9 contre le virus respiratoire syncytial (VRS), une autre infection infantile courante et potentiellement grave, ainsi qu\u2019une l\u00e9g\u00e8re r\u00e9duction de l\u2019immunit\u00e9 contre certains virus du rhume.<\/p>\n<p>Le professeur Shiranee Srikandan, codirectrice du Centre imp\u00e9rial de biologie de la r\u00e9sistance bact\u00e9rienne et co-auteur principal a d\u00e9clar\u00e9 : \u00ab Le streptocoque A est l&rsquo;une des principales causes de d\u00e9c\u00e8s inattendus par sepsie chez des enfants par ailleurs en bonne sant\u00e9, et nous savons que, malheureusement, la progression de la maladie peut \u00eatre exceptionnellement rapide, ce qui fait de la pr\u00e9vention, plut\u00f4t que de l&rsquo;intervention, notre meilleure option pour r\u00e9duire les d\u00e9c\u00e8s. A et souligne l\u2019int\u00e9r\u00eat de d\u00e9velopper un vaccin contre le streptocoque A.<\/p>\n<p>Le professeur Mike Levin, du d\u00e9partement des maladies infectieuses de l&rsquo;Imperial, qui a dirig\u00e9 les \u00e9tudes DIAMONDS et PERFORM, a d\u00e9clar\u00e9 : \u00ab De nombreux enfants qui ont eu des infections \u00e0 Strep A ont \u00e9galement eu des infections virales en m\u00eame temps. Les enfants semblent avoir \u00e9t\u00e9 vuln\u00e9rables \u00e0 plusieurs infections en m\u00eame temps, probablement parce qu&rsquo;ils avaient rencontr\u00e9 moins d&rsquo;infections et avaient donc peu de chance de d\u00e9velopper leur immunit\u00e9. \u00bb<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les scientifiques ont d\u00e9couvert un lien entre les mesures de contr\u00f4le du COVID-19 et une<\/p>\n","protected":false},"author":1,"featured_media":10645,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[90,561,2457,5333,607,49,587,1924,1417],"class_list":["post-10644","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-contre","tag-covid19","tag-declin","tag-infantiles","tag-infections","tag-les","tag-liees","tag-limmunite","tag-restrictions","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - 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Depuis plus de dix ans, j'explore et rapporte les histoires poignantes des individus confront\u00e9s \u00e0 ces d\u00e9fis, tout en sensibilisant le public aux traitements novateurs et aux progr\u00e8s scientifiques dans ce domaine. 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