{"id":170792,"date":"2022-07-14T09:26:07","date_gmt":"2022-07-14T09:26:07","guid":{"rendered":"https:\/\/www.healthbenefitstimes.com\/glossary\/?p=170792"},"modified":"2022-07-14T09:26:07","modified_gmt":"2022-07-14T09:26:07","slug":"fever-of-unknown-origin","status":"publish","type":"post","link":"https:\/\/www.healthbenefitstimes.com\/glossary\/fever-of-unknown-origin\/","title":{"rendered":"Fever of unknown origin"},"content":{"rendered":"<p>An illness of at least 3 weeks\u2019 duration with fever exceeding 38.3\u00b0C on several occasions and diagnosis not established after 1 week of hospital investigation. The main causes are systemic and localized infections, neoplasms, or collagen-vascular diseases (e.g., rheumatoid arthritis, disseminated lupus erythematosus, and polyarteritis nodosa). Less common causes are granulomatous disease, inflammatory disease of the bowel, pulmonary embolization, drug fever, cirrhosis, and rare conditions such as Whipple\u2019s disease. Diseases such as AIDS, chronic fatigue syndrome, or Lyme disease are occasionally the cause of FUO. Some cases remain undiagnosed.<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An illness of at least 3 weeks\u2019 duration with fever exceeding 38.3\u00b0C on several occasions and diagnosis not established after 1 week of hospital investigation. The main causes are systemic and localized infections, neoplasms, or collagen-vascular diseases (e.g., rheumatoid arthritis, disseminated lupus erythematosus, and polyarteritis nodosa). Less common causes are granulomatous disease, inflammatory disease of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-170792","post","type-post","status-publish","format-standard","hentry","category-f"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fever of unknown origin - Definition of Fever of unknown origin<\/title>\n<meta name=\"description\" content=\"An illness of at least 3 weeks\u2019 duration with fever exceeding 38.3\u00b0C on several occasions and diagnosis not established after 1 week of hospital investigation. The main causes are systemic and localized infections, neoplasms, or collagen-vascular diseases (e.g., rheumatoid arthritis, disseminated lupus erythematosus, and polyarteritis nodosa). Less common causes are granulomatous disease, inflammatory disease of the bowel, pulmonary embolization, drug fever, cirrhosis, and rare conditions such as Whipple\u2019s disease. Diseases such as AIDS, chronic fatigue syndrome, or Lyme disease are occasionally the cause of FUO. Some cases remain undiagnosed.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.healthbenefitstimes.com\/glossary\/fever-of-unknown-origin\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fever of unknown origin - Definition of Fever of unknown origin\" \/>\n<meta property=\"og:description\" content=\"An illness of at least 3 weeks\u2019 duration with fever exceeding 38.3\u00b0C on several occasions and diagnosis not established after 1 week of hospital investigation. The main causes are systemic and localized infections, neoplasms, or collagen-vascular diseases (e.g., rheumatoid arthritis, disseminated lupus erythematosus, and polyarteritis nodosa). Less common causes are granulomatous disease, inflammatory disease of the bowel, pulmonary embolization, drug fever, cirrhosis, and rare conditions such as Whipple\u2019s disease. Diseases such as AIDS, chronic fatigue syndrome, or Lyme disease are occasionally the cause of FUO. 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