Un premier cas humain d\u2019infection par le virus Shamonda, jusqu\u2019ici uniquement document\u00e9 chez l\u2019animal, a \u00e9t\u00e9 identifi\u00e9 en France. Le patient, pris en charge aux Hospices civils de Lyon pour une maladie grave, pr\u00e9sentait une immunod\u00e9pression s\u00e9v\u00e8re. L\u2019apparition de sympt\u00f4mes neurologiques a conduit \u00e0 la r\u00e9alisation d\u2019analyses g\u00e9nomiques, qui ont permis d\u2019identifier le virus Shamonda par comparaison des s\u00e9quences avec des bases de donn\u00e9es. La pr\u00e9sence du virus a \u00e9t\u00e9 confirm\u00e9e dans plusieurs pr\u00e9l\u00e8vements effectu\u00e9s \u00e0 diff\u00e9rentes dates. Le patient est d\u00e9c\u00e9d\u00e9 d\u00e9but octobre 2026, le r\u00f4le exact du virus dans ce d\u00e9c\u00e8s restant \u00e0 pr\u00e9ciser.<\/p>\n
Les autorit\u00e9s sanitaires indiquent, dans l\u2019\u00e9tat actuel des connaissances, qu\u2019aucun risque n\u2019est identifi\u00e9 pour la population g\u00e9n\u00e9rale. Des investigations sont en cours pour comprendre les modalit\u00e9s de contamination de ce patient et caract\u00e9riser plus pr\u00e9cis\u00e9ment l\u2019implication du virus dans l\u2019\u00e9volution clinique.<\/p>\n
Le virus Shamonda appartient au genre Orthobunyavirus. Il a \u00e9t\u00e9 isol\u00e9 pour la premi\u00e8re fois chez des bovins au Nigeria en 1965, puis signal\u00e9 dans plusieurs r\u00e9gions d\u2019Afrique et au Japon, o\u00f9 il a \u00e9t\u00e9 isol\u00e9 en 2002. \u00c0 l\u2019\u00e9t\u00e9 2026, il a \u00e9t\u00e9 identifi\u00e9 pour la premi\u00e8re fois en Europe, notamment dans des \u00e9levages bovins fran\u00e7ais. En France, des \u00e9pisodes de maladie avaient \u00e9t\u00e9 observ\u00e9s d\u00e8s juin 2026 dans l\u2019Est du pays, avant l\u2019identification du virus fin juillet. Le cas annonc\u00e9 en octobre 2026 constitue la premi\u00e8re infection humaine document\u00e9e par ce virus, connu chez l\u2019animal depuis plusieurs d\u00e9cennies.<\/p>\n
Chez l\u2019animal, le virus Shamonda est transmis par la piq\u00fbre de moucherons infect\u00e9s du genre Culicoides. Les autorit\u00e9s v\u00e9t\u00e9rinaires ne rapportent pas de preuve de transmission directe significative entre animaux, \u00e0 l\u2019exception d\u2019une transmission possible de la m\u00e8re au f\u0153tus durant la gestation. La diffusion rapide du virus en \u00e9levage pourrait refl\u00e9ter une exposition commune des animaux \u00e0 des vecteurs infectants. Les bovins constituent l\u2019esp\u00e8ce la plus fr\u00e9quemment touch\u00e9e en Europe, mais des cas ont \u00e9galement \u00e9t\u00e9 signal\u00e9s chez les chevaux, les moutons et les ch\u00e8vres.<\/p>\n
Les autorit\u00e9s sanitaires signalent par ailleurs que le virus Shamonda fait d\u00e9j\u00e0 l\u2019objet de r\u00e9cits complotistes lui attribuant une origine ou une diffusion intentionnelle sans preuve, ce qui constitue un enjeu de vigilance en mati\u00e8re d\u2019information du public et de lutte contre la d\u00e9sinformation. Les donn\u00e9es actuellement disponibles restent limit\u00e9es, en particulier sur la transmission \u00e0 l\u2019\u00eatre humain et sur la dangerosit\u00e9 du virus en dehors de situations d\u2019immunod\u00e9pression s\u00e9v\u00e8re.\u00a0(contenu r\u00e9sum\u00e9 par l’IA)\u200bLire la Suite<\/a>\u200b<\/p>","protected":false},"excerpt":{"rendered":" Un premier cas humain d\u2019infection par le virus Shamonda, jusqu\u2019ici uniquement document\u00e9 chez l\u2019animal, a \u00e9t\u00e9 identifi\u00e9 en France. Le patient, pris en charge aux Hospices civils de Lyon pour […]<\/p>\n","protected":false},"author":1,"featured_media":4209,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[68,227],"class_list":["post-22071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sante-publique-prevention-epidemiologie","tag-inserm","tag-ia"],"_links":{"self":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/posts\/22071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22071"}],"version-history":[{"count":0,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/posts\/22071\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/media\/4209"}],"wp:attachment":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}