{"id":7433,"date":"2026-07-23T14:02:36","date_gmt":"2026-07-23T11:02:36","guid":{"rendered":"https:\/\/wiki.voka.io\/glossary\/avidite-anticorps\/"},"modified":"2026-07-23T14:02:31","modified_gmt":"2026-07-23T11:02:31","slug":"avidite-anticorps","status":"publish","type":"glossary_item","link":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/","title":{"rendered":"Avidit\u00e9 des anticorps"},"content":{"rendered":"\n

L’avidit\u00e9 des anticorps (du latin avidus<\/em> \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants. <\/p>\n\n

Ce param\u00e8tre indique directement le degr\u00e9 de maturit\u00e9 de la r\u00e9ponse immunitaire d’un organisme.<\/p>\n\n

\u00c9tiologie et physiopathologie<\/strong><\/h2>\n\n

Lors d’un premier contact avec un nouveau virus, le syst\u00e8me immunitaire produit des anticorps qui se lient initialement de mani\u00e8re faible aux antig\u00e8nes (avidit\u00e9 faible, liaison complexe antig\u00e8ne-anticorps faible).<\/p>\n\n

Au cours de plusieurs semaines ou mois (selon le type d’infection), l’affinit\u00e9 de liaison des anticorps avec les antig\u00e8nes augmente, et des anticorps \u00e0 forte avidit\u00e9 apparaissent dans le sang.<\/p>\n\n

Ainsi, le type d’anticorps permet de d\u00e9terminer les d\u00e9lais de l’infection :<\/p>\n\n

    \n
  • la pr\u00e9sence d’anticorps \u00e0 faible avidit\u00e9<\/strong> indique une infection r\u00e9cente ;<\/li>\n\n\n\n
  • la d\u00e9tection d’IgG \u00e0 forte avidit\u00e9<\/strong> signifie qu’une infection a eu lieu il y a au moins 3 \u00e0 4 mois.<\/li>\n<\/ul>\n\n

    Importance clinique<\/strong><\/h2>\n\n

    La d\u00e9termination de l’avidit\u00e9 est un test important pour les femmes enceintes lors du d\u00e9pistage TORCH. Par exemple, si des anticorps contre la toxoplasmose ou le cytom\u00e9galovirus sont d\u00e9tect\u00e9s chez une femme enceinte pour la premi\u00e8re fois, le m\u00e9decin doit comprendre avec pr\u00e9cision si l’infection a eu lieu pendant la grossesse ou si la femme a d\u00e9j\u00e0 \u00e9t\u00e9 infect\u00e9e auparavant.<\/p>\n\n

    Une forte avidit\u00e9 au cours du premier trimestre permet d’exclure le risque d’une infection primaire pendant la grossesse, \u00e9vitant ainsi des proc\u00e9dures invasives inutiles et un stress psychologique pour la patiente.<\/p>\n\n

    En pratique de laboratoire, l’avidit\u00e9 est mesur\u00e9e en pourcentage : plus le pourcentage est \u00e9lev\u00e9, plus l’immunit\u00e9 \u00e0 la maladie en question est \u00ab\u00a0ancienne\u00a0\u00bb.<\/p>\n","protected":false},"excerpt":{"rendered":"

    L’avidit\u00e9 des anticorps (du latin avidus<\/em> \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants. <\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-7433","glossary_item","type-glossary_item","status-publish","hentry"],"acf":[],"yoast_head":"\nAvidit\u00e9 des anticorps : d\u00e9finition m\u00e9dicale et description | Voka Wiki<\/title>\n<meta name=\"description\" content=\"L'avidit\u00e9 des anticorps (du latin avidus \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Avidit\u00e9 des anticorps\" \/>\n<meta property=\"og:description\" content=\"L'avidit\u00e9 des anticorps (du latin avidus \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/\" \/>\n<meta property=\"og:site_name\" content=\"Voka Wiki\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/VOKA3DAnatomyAndPathology\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/glossaire\\\/avidite-anticorps\\\/\",\"url\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/glossaire\\\/avidite-anticorps\\\/\",\"name\":\"Avidit\u00e9 des anticorps : d\u00e9finition m\u00e9dicale et description | Voka Wiki\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/#website\"},\"datePublished\":\"2026-07-23T11:02:36+00:00\",\"description\":\"L'avidit\u00e9 des anticorps (du latin avidus \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/glossaire\\\/avidite-anticorps\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/glossaire\\\/avidite-anticorps\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/glossaire\\\/avidite-anticorps\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Glossaire\",\"item\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/glossaire\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Avidit\u00e9 des anticorps\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/#website\",\"url\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/\",\"name\":\"Voka Wiki\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/#organization\"},\"alternateName\":\"Anatomy & Pathology Wiki by VOKA\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/#organization\",\"name\":\"Voka 3D Anatomy & Pathology\",\"alternateName\":\"VOKA\",\"url\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/wiki.voka.io\\\/wp-content\\\/uploads\\\/2025\\\/02\\\/cropped-voka-logo-1.png\",\"contentUrl\":\"https:\\\/\\\/wiki.voka.io\\\/wp-content\\\/uploads\\\/2025\\\/02\\\/cropped-voka-logo-1.png\",\"width\":70,\"height\":16,\"caption\":\"Voka 3D Anatomy & Pathology\"},\"image\":{\"@id\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/VOKA3DAnatomyAndPathology\\\/\",\"https:\\\/\\\/www.instagram.com\\\/voka.io\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/voka-io\\\/\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCqGGuOEpr62ScH8Pjk2q5zw\\\/videos\",\"https:\\\/\\\/www.pinterest.com\\\/VokaAnatomyPro\\\/\",\"https:\\\/\\\/www.threads.com\\\/@voka.io\"],\"description\":\"VOKA.io offers 3D medical animations and custom 3D modeling services. Our product, VOKA 3D Anatomy & Pathology, is a digital atlas with over 1,000 detailed 3D models of human anatomy and pathology, designed for medical education, training, and patient communication.\",\"email\":\"info@voka.io\",\"telephone\":\"+1 814 351 4442\",\"legalName\":\"Voka 3D Anatomy & Pathology\",\"foundingDate\":\"2017-02-12\",\"naics\":\"541512\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"51\",\"maxValue\":\"200\"},\"publishingPrinciples\":\"https:\\\/\\\/wiki.voka.io\\\/fr\\\/principes-de-publication\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Avidit\u00e9 des anticorps : d\u00e9finition m\u00e9dicale et description | Voka Wiki","description":"L'avidit\u00e9 des anticorps (du latin avidus \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/","og_locale":"fr_FR","og_type":"article","og_title":"Avidit\u00e9 des anticorps","og_description":"L'avidit\u00e9 des anticorps (du latin avidus \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants.","og_url":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/","og_site_name":"Voka Wiki","article_publisher":"https:\/\/www.facebook.com\/VOKA3DAnatomyAndPathology\/","twitter_card":"summary_large_image","twitter_misc":{"Dur\u00e9e de lecture estim\u00e9e":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/","url":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/","name":"Avidit\u00e9 des anticorps : d\u00e9finition m\u00e9dicale et description | Voka Wiki","isPartOf":{"@id":"https:\/\/wiki.voka.io\/fr\/#website"},"datePublished":"2026-07-23T11:02:36+00:00","description":"L'avidit\u00e9 des anticorps (du latin avidus \u2014 avide) est une mesure qui refl\u00e8te la force et la stabilit\u00e9 globales de la liaison entre des anticorps sp\u00e9cifiques (principalement des immunoglobulines de classe G) et les antig\u00e8nes correspondants.","breadcrumb":{"@id":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/wiki.voka.io\/fr\/glossaire\/avidite-anticorps\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/wiki.voka.io\/fr\/"},{"@type":"ListItem","position":2,"name":"Glossaire","item":"https:\/\/wiki.voka.io\/fr\/glossaire\/"},{"@type":"ListItem","position":3,"name":"Avidit\u00e9 des anticorps"}]},{"@type":"WebSite","@id":"https:\/\/wiki.voka.io\/fr\/#website","url":"https:\/\/wiki.voka.io\/fr\/","name":"Voka Wiki","description":"","publisher":{"@id":"https:\/\/wiki.voka.io\/fr\/#organization"},"alternateName":"Anatomy & Pathology Wiki by VOKA","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/wiki.voka.io\/fr\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Organization","@id":"https:\/\/wiki.voka.io\/fr\/#organization","name":"Voka 3D Anatomy & Pathology","alternateName":"VOKA","url":"https:\/\/wiki.voka.io\/fr\/","logo":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/wiki.voka.io\/fr\/#\/schema\/logo\/image\/","url":"https:\/\/wiki.voka.io\/wp-content\/uploads\/2025\/02\/cropped-voka-logo-1.png","contentUrl":"https:\/\/wiki.voka.io\/wp-content\/uploads\/2025\/02\/cropped-voka-logo-1.png","width":70,"height":16,"caption":"Voka 3D Anatomy & Pathology"},"image":{"@id":"https:\/\/wiki.voka.io\/fr\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/VOKA3DAnatomyAndPathology\/","https:\/\/www.instagram.com\/voka.io\/","https:\/\/www.linkedin.com\/company\/voka-io\/","https:\/\/www.youtube.com\/channel\/UCqGGuOEpr62ScH8Pjk2q5zw\/videos","https:\/\/www.pinterest.com\/VokaAnatomyPro\/","https:\/\/www.threads.com\/@voka.io"],"description":"VOKA.io offers 3D medical animations and custom 3D modeling services. Our product, VOKA 3D Anatomy & Pathology, is a digital atlas with over 1,000 detailed 3D models of human anatomy and pathology, designed for medical education, training, and patient communication.","email":"info@voka.io","telephone":"+1 814 351 4442","legalName":"Voka 3D Anatomy & Pathology","foundingDate":"2017-02-12","naics":"541512","numberOfEmployees":{"@type":"QuantitativeValue","minValue":"51","maxValue":"200"},"publishingPrinciples":"https:\/\/wiki.voka.io\/fr\/principes-de-publication\/"}]}},"_links":{"self":[{"href":"https:\/\/wiki.voka.io\/fr\/wp-json\/wp\/v2\/glossary_item\/7433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wiki.voka.io\/fr\/wp-json\/wp\/v2\/glossary_item"}],"about":[{"href":"https:\/\/wiki.voka.io\/fr\/wp-json\/wp\/v2\/types\/glossary_item"}],"wp:attachment":[{"href":"https:\/\/wiki.voka.io\/fr\/wp-json\/wp\/v2\/media?parent=7433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}