{"id":19489,"date":"2026-02-27T18:42:23","date_gmt":"2026-02-27T17:42:23","guid":{"rendered":"https:\/\/francelyme.fr\/site\/ufaq\/66-quest-ce-quun-faux-positif\/"},"modified":"2026-02-28T19:26:14","modified_gmt":"2026-02-28T18:26:14","slug":"66-quest-ce-quun-faux-positif","status":"publish","type":"ufaq","link":"https:\/\/francelyme.fr\/site\/ufaq\/66-quest-ce-quun-faux-positif\/","title":{"rendered":"066. Qu\u2019est-ce qu\u2019un \u00ab\u00a0faux positif\u00a0\u00bb ?"},"content":{"rendered":"<div class=\"like-button\" style=\"float: right; clear: both; text-align: right; width = 100%;\">\n<!-- Facebook Like Button Vivacity Infotech BEGIN -->\n<div class=\"fb-like\" data-href=\"https:\/\/francelyme.fr\/site\/ufaq\/66-quest-ce-quun-faux-positif\/\" data-layout=\"box_count\" data-action=\"like\" data-show-faces=\"false\" data-size=\"large\" data-width=\"450\" data-share=\"1\" ><\/div><\/div>\n<!-- Facebook Like Button Vivacity Infotech END -->\n<div id=\"fb-root\"><\/div>\n<style>.ewd-ufaq-faq-header-title a { font-family: Garamond !important; }<\/style><div  class=\"ewd-ufaq-faq-list ewd-ufaq-page-type-distinct ewd-ufaq-category-tabs-\" id='ewd-ufaq-faq-list'>\n\n\t<input type='hidden' name='show_on_load' value='' id='ewd-ufaq-show-on-load' \/>\n<input type='hidden' name='include_category' value='' id='ewd-ufaq-include-category' \/>\n<input type='hidden' name='exclude_category' value='' id='ewd-ufaq-exclude-category' \/>\n<input type='hidden' name='orderby' value='title' id='ewd-ufaq-orderby' \/>\n<input type='hidden' name='order' value='asc' id='ewd-ufaq-order' \/>\n<input type='hidden' name='post_count' value='-1' id='ewd-ufaq-post-count' \/>\n<input type='hidden' name='current_url' value='\/site\/wp-json\/wp\/v2\/ufaq\/19489' id='ewd-ufaq-current-url' \/>\n\t\n\t\n\t<div class='ewd-ufaq-faqs'>\n\n\t\t<div  class=\"ewd-ufaq-faq-div ewd-ufaq-faq-column-count-one ewd-ufaq-faq-responsive-columns- ewd-ufaq-faq-display-style-default ewd-ufaq-can-be-toggled\" id='ewd-ufaq-post-19489-uVzQbxaupG' data-post_id='19489'>\n\n\t\t\n\t<div class='ewd-ufaq-faq-title ewd-ufaq-faq-toggle'>\n\t\n\t<a class='ewd-ufaq-post-margin'  href='#' role=\"button\">\n\n\t\t<div class='ewd-ufaq-post-margin-symbol ewd-ufaq-'>\n\t\t\t<span >A<\/span>\n\t\t<\/div>\n\n\t\t<div class='ewd-ufaq-faq-title-text'>\n\n\t\t\t<h4>\n\t\t\t\t066. Qu\u2019est-ce qu\u2019un \u00ab\u00a0faux positif\u00a0\u00bb ?\t\t\t<\/h4>\n\n\t\t<\/div>\n\n\t\t<div class='ewd-ufaq-clear'><\/div>\n\n\t<\/a>\n\t\n<\/div>\n\t\n\t<div class='ewd-ufaq-faq-body' >\n\n\t\t\n\t\t\t<div class='ewd-ufaq-post-margin ewd-ufaq-faq-post'>\n\t<div class=\"like-button\" style=\"float: right;clear: both;text-align: right\">\n<!-- Facebook Like Button Vivacity Infotech BEGIN -->\n<div class=\"fb-like\" data-href=\"https:\/\/francelyme.fr\/site\/ufaq\/66-quest-ce-quun-faux-positif\/\" data-layout=\"box_count\" data-action=\"like\" data-show-faces=\"false\" data-size=\"large\" data-width=\"450\" data-share=\"1\"><\/div><\/div>\n<!-- Facebook Like Button Vivacity Infotech END -->\n<div id=\"fb-root\"><\/div>\n<p style=\"font-weight: 400\">Un \u00ab\u00a0faux positif\u00a0\u00bb peut correspondre \u00e0 deux situations diff\u00e9rentes\u00a0:<\/p>\n<ul>\n<li>1) Une erreur de la s\u00e9rologie en deux temps qui, bien que dot\u00e9e d\u2019une tr\u00e8s forte sp\u00e9cificit\u00e9 et d\u2019une tr\u00e8s forte sensibilit\u00e9, n\u2019est pas exempte d\u2019erreurs.<\/li>\n<li>2) S\u00e9rologie positive, mais infection ancienne\u00a0:<\/li>\n<\/ul>\n<p style=\"font-weight: 400\">La personne n\u2019est pas malade de Lyme, mais l\u2019a \u00e9t\u00e9 dans le pass\u00e9. Ici, le test n\u2019est pas \u201cfaux\u201d : il a trouv\u00e9 des anticorps, mais qui datent de l\u2019infection pass\u00e9e. Il faut savoir en effet que les anticorps peuvent persister des mois ou des ann\u00e9es apr\u00e8s la disparition de l\u2019infection.<\/p>\n<p style=\"font-weight: 400\">Piste utile pour les patients : si la personne a des sympt\u00f4mes inhabituels persistants, cela plaide pour qu\u2019il y ait de toute fa\u00e7on quelque chose \u00e0 explorer m\u00e9dicalement (Lyme ou une autre maladie vectorielle \u00e0 tiques ou un autre diagnostic), m\u00eame si une s\u00e9rologie positive ne permet pas, \u00e0 elle seule, de prouver une infection active. Dans ce cas, il est important d\u2019en parler avec le m\u00e9decin, de v\u00e9rifier la chronologie et de rechercher des diagnostics diff\u00e9rentiels si n\u00e9cessaire.<\/p>\n<div class=\"like-button\" style=\"float: right;clear: both;text-align: right\">\n<!-- Facebook Like Button Vivacity Infotech BEGIN -->\n<div class=\"fb-like\" data-href=\"https:\/\/francelyme.fr\/site\/ufaq\/66-quest-ce-quun-faux-positif\/\" data-layout=\"box_count\" data-action=\"like\" data-show-faces=\"false\" data-size=\"large\" data-width=\"450\" data-share=\"1\"><\/div><\/div>\n<!-- Facebook Like Button Vivacity Infotech END -->\n<\/div>\n\t\t\n\t\t\t<div class='ewd-ufaq-author-date'>\n\n\tMis en ligne\n\t\n\tle\n<span class='ewd-ufaq-date'>\n\t27 f\u00e9vrier 2026<\/span>\n<\/div>\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t<div class='ewd-ufaq-ratings'>\n\t\n\t<div class='ewd-ufaq-ratings-label'>\n\t\tCette information vous a-t-elle \u00e9t\u00e9 utile ?\t<\/div>\n\t\n\t<div class='ewd-ufaq-rating-button ewd-ufaq-up-vote ewd-ufaq-ratings-default-image' data-faq_id='19489'>\n\t\t<img decoding=\"async\" src=\"https:\/\/francelyme.fr\/site\/wp-content\/plugins\/ultimate-faqs\/assets\/img\/Thumbs-up-icon.png\" alt=\"Thumbs Up Icon\">\t\t<span>2<\/span>\n\t<\/div>\n\t\n\t<div class='ewd-ufaq-rating-button ewd-ufaq-down-vote ewd-ufaq-ratings-default-image' data-faq_id='19489'>\n\t\t<img decoding=\"async\" src=\"https:\/\/francelyme.fr\/site\/wp-content\/plugins\/ultimate-faqs\/assets\/img\/Thumbs-down-icon.png\" alt=\"Thumbs Down Icon\">\t\t<span>0<\/span>\n\t<\/div>\n<\/div>\n\n<div class='ewd-ufaq-clear'><\/div>\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t\t\t\n\t\t\n\t<\/div>\n\n<\/div>\n\t<\/div>\n\n\t\n<\/div><div class=\"like-button\" style=\"float: right; clear: both; text-align: right; width = 100%;\">\n<!-- Facebook Like Button Vivacity Infotech BEGIN -->\n<div class=\"fb-like\" data-href=\"https:\/\/francelyme.fr\/site\/ufaq\/66-quest-ce-quun-faux-positif\/\" data-layout=\"box_count\" data-action=\"like\" data-show-faces=\"false\" data-size=\"large\" data-width=\"450\" data-share=\"1\" ><\/div><\/div>\n<!-- Facebook Like Button Vivacity Infotech END -->\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","ufaq-category":[337],"ufaq-tag":[],"class_list":["post-19489","ufaq","type-ufaq","status-publish","hentry","ufaq-category-diagnostic"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>066. 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