{"id":1472,"date":"2025-09-19T14:37:11","date_gmt":"2025-09-19T11:37:11","guid":{"rendered":"https:\/\/wiki.voka.io\/glossary\/mononucleose-infecciosa\/"},"modified":"2025-10-07T19:17:08","modified_gmt":"2025-10-07T16:17:08","slug":"mononucleose-infecciosa","status":"publish","type":"glossary_item","link":"https:\/\/wiki.voka.io\/pt\/glossario\/mononucleose-infecciosa\/","title":{"rendered":"Mononucleose infecciosa"},"content":{"rendered":"\n<p>A mononucleose infecciosa \u00e9 uma doen\u00e7a viral aguda causada principalmente pelo v\u00edrus Epstein-Barr (EBV). Caracteriza-se por febre, les\u00f5es na orofaringe (amigdalite), aumento dos linfonodos, f\u00edgado, ba\u00e7o e aparecimento de c\u00e9lulas espec\u00edficas no sangue: c\u00e9lulas mononucleares at\u00edpicas.<\/p>\n\n<p>A doen\u00e7a afeta geralmente jovens e \u00e9 frequentemente transmitida pela saliva, raz\u00e3o pela qual recebeu o nome de \u00abdoen\u00e7a dos beijos\u00bb. As manifesta\u00e7\u00f5es cl\u00ednicas n\u00e3o s\u00e3o um resultado do efeito direto do v\u00edrus, mas sim uma consequ\u00eancia da rea\u00e7\u00e3o exagerada do sistema imunit\u00e1rio aos linf\u00f3citos B infetados.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x44D;&#x442;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;-&#x438;-&#x43F;&#x430;&#x442;&#x43E;&#x444;&#x438;&#x437;&#x438;&#x43E;&#x43B;&#x43E;&#x433;&#x438;&#x44F;\"><strong>Etiologia e fisiopatologia<\/strong><\/h2>\n\n<p>O agente causador \u00e9 o v\u00edrus Epstein-Barr, pertencente \u00e0 fam\u00edlia Herpesviridae. O v\u00edrus penetra no organismo atrav\u00e9s das membranas mucosas da orofaringe e infeta os linf\u00f3citos B, provocando a sua multiplica\u00e7\u00e3o ativa (prolifera\u00e7\u00e3o).<\/p>\n\n<p>Em resposta, o sistema imunit\u00e1rio produz um grande n\u00famero de linf\u00f3citos T (c\u00e9lulas T citot\u00f3xicas) concebidos para destruir os linf\u00f3citos B infectados. Estas c\u00e9lulas T reativas s\u00e3o os \u00abmononucleares at\u00edpicos\u00bb que servem de marcador hematol\u00f3gico da doen\u00e7a.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x43A;&#x43B;&#x438;&#x43D;&#x438;&#x447;&#x435;&#x441;&#x43A;&#x43E;&#x435;-&#x437;&#x43D;&#x430;&#x447;&#x435;&#x43D;&#x438;&#x435;\"><strong>Signific\u00e2ncia cl\u00ednica<\/strong><\/h2>\n\n<p>O quadro cl\u00ednico consiste na tr\u00edade cl\u00e1ssica de sintomas:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Febre.<\/strong> A temperatura corporal pode subir at\u00e9 38\u00b0 a 39\u00b0C e persistir de 1 a 2 semanas.<\/li>\n\n\n\n<li><strong>Amigdalite (anginas).<\/strong> Dor de garganta, am\u00edgdalas aumentadas e avermelhadas, frequentemente com placas branco-acinzentadas maci\u00e7as.<\/li>\n\n\n\n<li><strong>Linfadenopatia.<\/strong> Os linfonodos aumentados, especialmente os cervicais posteriores, tornam-se duros e doloridos.<\/li>\n<\/ul>\n\n<p>Tamb\u00e9m \u00e9 comum o aumento do ba\u00e7o (esplenomegalia) e do f\u00edgado. O diagn\u00f3stico baseia-se no quadro cl\u00ednico, hemograma completo (linfocitose, c\u00e9lulas mononucleares at\u00edpicas&gt; 10%) e testes serol\u00f3gicos de anticorpos contra o VEB.<\/p>\n\n<p>O tratamento \u00e9 geralmente sintom\u00e1tico: repouso na cama, ingest\u00e3o abundante de l\u00edquidos, analg\u00e9sicos. \u00c9 importante evitar atividades f\u00edsicas durante 3 a 4 semanas devido ao risco de rutura do ba\u00e7o aumentado.<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"h-&#x434;&#x438;&#x444;&#x444;&#x435;&#x440;&#x435;&#x43D;&#x446;&#x438;&#x430;&#x43B;&#x44C;&#x43D;&#x43E;-&#x434;&#x438;&#x430;&#x433;&#x43D;&#x43E;&#x441;&#x442;&#x438;&#x447;&#x435;&#x441;&#x43A;&#x438;&#x435;-&#x430;&#x441;&#x43F;&#x435;&#x43A;&#x442;&#x44B;\"><strong>Aspectos do diagn\u00f3stico diferencial<\/strong><\/h2>\n\n<p>A mononucleose infecciosa deve ser diferenciada principalmente da amigdalite estreptoc\u00f3cica. Ao contr\u00e1rio da amigdalite, a mononucleose \u00e9 caracterizada por linfadenopatia generalizada, aumento do f\u00edgado e do ba\u00e7o, bem como por altera\u00e7\u00f5es espec\u00edficas na an\u00e1lise do sangue.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A mononucleose infecciosa \u00e9 uma doen\u00e7a viral aguda causada principalmente pelo v\u00edrus Epstein-Barr (EBV). Caracteriza-se por febre, les\u00f5es na orofaringe (amigdalite), aumento dos linfonodos, f\u00edgado, ba\u00e7o e aparecimento de c\u00e9lulas espec\u00edficas no sangue: c\u00e9lulas mononucleares at\u00edpicas.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-1472","glossary_item","type-glossary_item","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mononucleose infecciosa: defini\u00e7\u00e3o m\u00e9dica e vis\u00e3o geral | Voka Wiki<\/title>\n<meta name=\"description\" content=\"A mononucleose infecciosa \u00e9 uma doen\u00e7a viral aguda causada principalmente pelo v\u00edrus Epstein-Barr (EBV). 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