{"id":64,"date":"2009-02-27T00:03:26","date_gmt":"2009-02-27T00:03:26","guid":{"rendered":"https:\/\/medicalcriteria.com\/web\/inffuo\/"},"modified":"2025-05-14T21:00:16","modified_gmt":"2025-05-14T21:00:16","slug":"inffuo","status":"publish","type":"post","link":"https:\/\/medicalcriteria.com\/web\/inffuo\/","title":{"rendered":"Classification of Fever of Unknown Origin (FUO)"},"content":{"rendered":"<div class=\"99c380e4b4a7b96c35d7ddf7dcb434e8\" data-index=\"1\" style=\"float: none; margin:0px 0 0px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<!-- MC 2019- Horizontal -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-0127150553352455\"\r\n     data-ad-slot=\"3806776041\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>FUO is body temperature\u00a0<span class=\"symbol\">\u2265<\/span>\u00a038.3<span class=\"symbol\">\u00b0<\/span>\u00a0C (101\u00b0 F) rectally that does not result from transient and self-limited illness, rapidly fatal illness, or disorders with clear-cut localizing symptoms or signs or with abnormalities on common tests such as chest x-ray, urinalysis, or blood cultures.<br \/>\n<!--more--><\/p>\n<table style=\"border-collapse: collapse; width: 100%;\" border=\"1\">\n<tbody>\n<tr>\n<td style=\"width: 20.2424%;\"><strong>Category of FUO<\/strong><\/td>\n<td style=\"width: 38.4242%;\"><strong>Definition<\/strong><\/td>\n<td style=\"width: 41.3333%;\"><strong>Common etiologies<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.2424%;\">Classic<\/td>\n<td style=\"width: 38.4242%;\">Temperature &gt;38.3\u00b0C (100.9\u00b0F)<br \/>\nDuration of &gt;3 weeks<br \/>\nEvaluation of at least 3 outpatient visits or 3 days in hospital<\/td>\n<td style=\"width: 41.3333%;\">Infection, malignancy, collagen vascular disease<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.2424%;\">Nosocomial<\/td>\n<td style=\"width: 38.4242%;\">Temperature &gt;38.3\u00b0C<br \/>\nPatient hospitalized &gt;=24 hours but no fever or incubating on admission<br \/>\nEvaluation of at least 3 days<\/td>\n<td style=\"width: 41.3333%;\"><em>Clostridium difficile<\/em>\u00a0enterocolitis, drug-induced, pulmonary embolism, septic thrombophlebitis, sinusitis<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.2424%;\">Immune deficient (neutropenic)<\/td>\n<td style=\"width: 38.4242%;\">Temperature &gt;38.3\u00b0C<br \/>\nNeutrophil count &lt;=500 per mm<sup>3<\/sup><br \/>\nEvaluation of at least 3 days<\/td>\n<td style=\"width: 41.3333%;\">Opportunistic bacterial infections, aspergillosis, candidiasis, herpes virus<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.2424%;\">HIV-associated<\/td>\n<td style=\"width: 38.4242%;\">Temperature &gt;38.3\u00b0C<br \/>\nDuration of &gt;4 weeks for outpatients, &gt;3 days for inpatients<br \/>\nHIV infection confirmed<\/td>\n<td style=\"width: 41.3333%;\">Cytomegalovirus,\u00a0<em>Mycobacterium avium-intracellulare complex, Pneumocystis carinii\u00a0<\/em>pneumonia, drug-induced, Kaposi&#8217;s sarcoma, lymphoma<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"MsoNormal\">HIV = human immunodeficiency virus.<\/p>\n<p class=\"MsoNormal\"><strong> Common Etiologies of Fever of Unknown Origin<\/strong><\/p>\n<p class=\"MsoNormal\"><strong> Infections <\/strong><\/p>\n<ul>\n<li>Tuberculosis (especially extrapulmonary)<\/li>\n<li>Abdominal abscesses<\/li>\n<li>Pelvic abscesses<\/li>\n<li>Dental abscesses<\/li>\n<li>Endocarditis<\/li>\n<li>Osteomyelitis<\/li>\n<li>Sinusitis<\/li>\n<li>Cytomegalovirus<\/li>\n<li>Epstein-Barr virus<\/li>\n<li>Human immunodeficiency virus<\/li>\n<li>Lyme disease<\/li>\n<li>Prostatitis<\/li>\n<li>Sinusitis<\/li>\n<\/ul>\n<p class=\"MsoNormal\"><strong> Malignancies <\/strong><\/p>\n<ul>\n<li>Chronic leukaemia<\/li>\n<li>Lymphoma<\/li>\n<li>Metastatic cancers<\/li>\n<li>Renal cell carcinoma<\/li>\n<li>Colon carcinoma<\/li>\n<li>Hepatoma<\/li>\n<li>Myelodysplastic syndromes<\/li>\n<li>Pancreatic carcinoma<\/li>\n<li>Sarcomas<\/li>\n<\/ul>\n<p class=\"MsoNormal\"><strong> Autoimmune conditions<\/strong><\/p>\n<ul>\n<li>Adult Still&#8217;s disease<\/li>\n<li>Polymyalgia rheumatica<\/li>\n<li>Temporal arteritis<\/li>\n<li>Rheumatoid arthritis<\/li>\n<li>Rheumatoid fever<\/li>\n<li>Inflammatory bowel disease<\/li>\n<li>Reiter&#8217;s syndrome<\/li>\n<li>Systemic lupus erythematosus<\/li>\n<li>Vasculitides<\/li>\n<\/ul>\n<p class=\"MsoNormal\"><strong> Miscellaneous <\/strong><\/p>\n<ul>\n<li>Drug-induced fever<\/li>\n<li>Complications from cirrhosis<\/li>\n<li>Factitious fever<\/li>\n<li>Hepatitis (alcoholic, granulomatous, or lupoid)<\/li>\n<li>Deep venous thrombosis<\/li>\n<li>Sarcoidosis<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p class=\"MsoNormal\"><strong>References:<\/strong><\/p>\n<ol>\n<li style=\"margin-top: 0pt; margin-bottom: 0pt;\">Durack DT, Street AC. Fever of unknown origin&#8211;reexamined and redefined. Curr Clin Top Infect Dis. 1991;11:35-51. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/1651090\/\" target=\"_blank\" rel=\"noopener noreferrer\">[Medline]<\/a><\/li>\n<li class=\"MsoNormal\">Hirschmann JV. Fever of unknown origin in adults. Clin Infect Dis. 1997 Mar;24(3):291-300 <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/9114175\/\" target=\"_blank\" rel=\"noopener noreferrer\">[Medline]<\/a><\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>Created: July 04, 2006<\/p>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Sorry, this entry is only available in Espa\u00f1ol.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[39],"tags":[167,1806,802,801,1805,1344,1804,1803,1807],"class_list":["post-64","post","type-post","status-publish","format-standard","hentry","category-infetious-disease","tag-classification","tag-desconocido","tag-fever","tag-fiebre","tag-fuo","tag-infectious","tag-origen","tag-origin","tag-unknown"],"modified_by":"Guillermo Firman","_links":{"self":[{"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/posts\/64","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/comments?post=64"}],"version-history":[{"count":3,"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/posts\/64\/revisions"}],"predecessor-version":[{"id":8937,"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/posts\/64\/revisions\/8937"}],"wp:attachment":[{"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/media?parent=64"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/categories?post=64"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/medicalcriteria.com\/web\/wp-json\/wp\/v2\/tags?post=64"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}