{"id":1038,"date":"2024-10-03T23:16:36","date_gmt":"2024-10-03T21:16:36","guid":{"rendered":"https:\/\/rvh-synergie.org\/actualites\/letude-explique-que-les-reponses-danticorps-vacciniques-de-mpox-diminuent-en-un-an\/"},"modified":"2024-10-03T23:16:36","modified_gmt":"2024-10-03T21:16:36","slug":"letude-explique-que-les-reponses-danticorps-vacciniques-de-mpox-diminuent-en-un-an","status":"publish","type":"post","link":"https:\/\/rvh-synergie.org\/actualites\/letude-explique-que-les-reponses-danticorps-vacciniques-de-mpox-diminuent-en-un-an\/","title":{"rendered":"L&rsquo;\u00e9tude explique que les r\u00e9ponses d&rsquo;anticorps vacciniques de mpox diminuent en un an"},"content":{"rendered":"<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2024\/mpox-jabs.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2024\/mpox-jabs.jpg\" data-sub-html=\"Mpox Virus Particle Colorized transmission electron micrograph of an mpox virus particle (yellow and red) found within an infected VERO E6 cell (blue), cultured in the laboratory. Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland. Credit: NIAID\/CC0 Public Domain\">\n<figure class=\"article-img\">\n<\/figure><\/div>\n<\/div>\n<p>Une \u00e9tude men\u00e9e par des chercheurs du Beth Israel Deaconess Medical Center (BIDMC) a d\u00e9montr\u00e9 que les niveaux d\u2019anticorps mpox diminuaient rapidement et revenaient presque \u00e0 leur niveau de base six \u00e0 12 mois apr\u00e8s que les patients avaient re\u00e7u le vaccin mpox. Les r\u00e9sultats, publi\u00e9s dans <i>JAMA<\/i>sugg\u00e8rent que l&rsquo;immunit\u00e9 protectrice pourrait avoir diminu\u00e9 chez les individus pr\u00e9c\u00e9demment vaccin\u00e9s et qu&rsquo;un renforcement pourrait \u00eatre n\u00e9cessaire pour maintenir une protection solide.<\/p>\n<p>\u00ab\u00a0L&rsquo;OMS a d\u00e9clar\u00e9 l&rsquo;\u00e9pid\u00e9mie actuelle de mpox en R\u00e9publique d\u00e9mocratique du Congo une urgence de sant\u00e9 publique\u00a0\u00bb, a d\u00e9clar\u00e9 l&rsquo;auteur correspondant Dan H. Barouch, MD, Ph.D., directeur du Centre de recherche sur les vaccins et la virologie du BIDMC. \u00ab\u00a0Il est donc important d&rsquo;\u00e9valuer le risque d&rsquo;infection pour les personnes qui ont \u00e9t\u00e9 vaccin\u00e9es contre la maladie lors de l&rsquo;\u00e9pid\u00e9mie de 2022.\u00a0\u00bb<\/p>\n<p>Anciennement connue sous le nom de variole du singe, l\u2019\u00e9pid\u00e9mie de mpox de 2022 a marqu\u00e9 la premi\u00e8re fois que le virus s\u2019est largement propag\u00e9 dans plusieurs pays au-del\u00e0 de l\u2019Afrique. Se propageant principalement par contact peau \u00e0 peau \u00e9troit, en particulier lors d&rsquo;une activit\u00e9 sexuelle, le mpox se manifeste par de la fi\u00e8vre, des ganglions lymphatiques enfl\u00e9s et des \u00e9ruptions cutan\u00e9es ou des plaies douloureuses.<\/p>\n<p>Pour contenir l&rsquo;\u00e9pid\u00e9mie, les responsables de la sant\u00e9 publique ont donn\u00e9 la priorit\u00e9 \u00e0 la vaccination des populations les plus expos\u00e9es \u00e0 un risque d&rsquo;exposition, notamment les personnes qui ont de nouveaux ou plusieurs partenaires sexuels, en particulier les hommes ayant des rapports sexuels avec des hommes ; les agents de sant\u00e9 et le personnel de laboratoire ; et les personnes qui ont voyag\u00e9 dans une communaut\u00e9 o\u00f9 le mpox a \u00e9t\u00e9 identifi\u00e9.<\/p>\n<p>Barouch et ses coll\u00e8gues ont \u00e9valu\u00e9 les r\u00e9ponses immunitaires sp\u00e9cifiques au mpox pendant 12 mois chez 45 personnes vaccin\u00e9es lors de l\u2019\u00e9pid\u00e9mie de mpox de 2022. L&rsquo;\u00e9quipe a r\u00e9alis\u00e9 une \u00e9tude observationnelle chez des adultes ayant re\u00e7u une ou deux doses du vaccin MVA-BN (connu sous le nom de marque Jynneos) ou ayant re\u00e7u un diagnostic confirm\u00e9 d&rsquo;infection par mpox, \u00e9valuant les r\u00e9ponses des anticorps s\u00e9riques et des lymphocytes T au d\u00e9part, trois semaines, trois mois, six mois, neuf mois et 12 mois apr\u00e8s la vaccination. Ils ont observ\u00e9 que la vaccination g\u00e9n\u00e9rait des anticorps s\u00e9riques mpox qui disparaissaient largement six \u00e0 12 mois apr\u00e8s la vaccination.<\/p>\n<p>\u00ab\u00a0Notre \u00e9tude met en \u00e9vidence l&rsquo;importance de compl\u00e9ter le vaccin mpox \u00e0 deux doses recommand\u00e9, qu&rsquo;il soit sous-cutan\u00e9 ou intradermique, pour renforcer l&rsquo;immunit\u00e9, quel que soit le temps \u00e9coul\u00e9 entre les doses\u00a0\u00bb, a d\u00e9clar\u00e9 l&rsquo;auteur principal Ai-ris Yonekura Collier, MD, co-directeur de l&rsquo;\u00e9tude clinique. Unit\u00e9 des Essais au BIDMC. \u00ab Dans cette \u00e9pid\u00e9mie de mpox, il est crucial de garantir un large acc\u00e8s \u00e0 la s\u00e9rie compl\u00e8te de vaccins. \u00bb<\/p>\n<p>Les anticorps s\u00e9riques mpox \u00e9taient corr\u00e9l\u00e9s \u00e0 la protection contre la provocation par mpox dans les \u00e9tudes pr\u00e9cliniques. Des \u00e9tudes humaines plus vastes sont n\u00e9cessaires pour confirmer la g\u00e9n\u00e9ralisabilit\u00e9 et \u00e9valuer l\u2019efficacit\u00e9 du vaccin au fil du temps, a d\u00e9clar\u00e9 Barouch.<\/p>\n<p>Les co-auteurs comprenaient Katherine McMahan, MS, Catherine Jacob-Dolan, Ph.D., Jinyan Liu, Ph.D., Erica N Borducchi, Ph.D., de BIDMC\u00a0; et Bernard Moss, MD, Ph.D., de l&rsquo;Institut national des allergies et des maladies infectieuses.<\/p>\n<p>                                        <!-- print only --><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Une \u00e9tude men\u00e9e par des chercheurs du Beth Israel Deaconess Medical Center (BIDMC) a d\u00e9montr\u00e9<\/p>\n","protected":false},"author":1,"featured_media":581,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[1347,1349,1237,49,1346,324,1158,1348],"class_list":["post-1038","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-maladies","tag-danticorps","tag-diminuent","tag-explique","tag-les","tag-letude","tag-mpox","tag-reponses","tag-vacciniques","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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