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1. • • Fever of unknown origin (FUO) is body temperature ≥ 38.3° C (≥ 101° 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 radiograph, urinalysis, or blood cultures.
     www.merckmanuals.com/professional/infectious-diseases/biology-of-infectious-disease/fever-of-unknown-origin-fuo

     Fever of Unknown Origin (FUO) - Fever of Unknown Origin (FUO ...

2. www.ncbi.nlm.nih.gov › books › NBK532265Fever of Unknown Origin - StatPearls - NCBI Bookshelf

   www.ncbi.nlm.nih.gov › books › NBK532265

   Aug 14, 2023 · Fever of unknown origin (FUO) was first described by Dr. Petersdorf and Dr. Beesom in 1961. FUO was defined as a temperature of 101 degrees Fahrenheit (38.3 degrees Centigrade) or higher with a minimum duration of three weeks without an established diagnosis despite at least one week's investigation in the hospital.

   • Author: Ilona Brown, Nancy A. Finnigan
   • Published: 2023/08/14

   • Publish Year: 2021

3. www.merckmanuals.com › fever-of-unknown-origin-fuoFever of Unknown Origin (FUO) - Fever of Unknown Origin (FUO ...

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   Jul 9, 2024 · Fever of unknown origin (FUO) is body temperature ≥ 38.3° C (≥ 101° 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 radiograph, urinalysis, or blood cultures.

   • Author: Larry M. Bush

4. Videos

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5. www.aafp.org › pubs › afpFever of Unknown Origin in Adults | AAFP

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   Fever of unknown origin is defined as a clinically documented temperature of 101°F or higher on several occasions, coupled with an unrevealing diagnostic workup. The differential...

6. www.uptodate.com › contents › fever-of-unknownFever of unknown origin in adults: Evaluation and management

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   Nov 28, 2023 · Clinicians commonly refer to a febrile illness without an initially obvious etiology as fever of unknown origin (FUO). However, most febrile illnesses either resolve before a diagnosis can be made or develop distinguishing characteristics that lead to a diagnosis.

7. emedicine.medscape.com › article › 217675-clinicalFever of Unknown Origin (FUO) Clinical Presentation - Medscape

   emedicine.medscape.com › article › 217675-clinical

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   Fever of unknown origin (FUO) was defined in 1961 by Petersdorf and Beeson as the following: (1) a temperature greater than 38.3°C (101°F) on several occasions, (2) more than 3...

8. www.sciencedirect.com › fever-of-unknown-originFever of Unknown Origin - an overview | ScienceDirect Topics

   www.sciencedirect.com › fever-of-unknown-origin

   Fever of unknown origin (FUO) is an illness characterized by fever greater than 101° F for at least 3 weeks that remains undiagnosed after an initial evaluation, including a comprehensive history, examination, and basic laboratory testing.

9. People also ask

   What is a fever of unknown origin (FUO)?

   • Fever of unknown origin (FUO) was defined in 1961 by Petersdorf and Beeson as the following: (1) a temperature greater than 38.3°C (101°F) on several occasions, (2) more than 3 weeks' duration of illness, and (3) failure to reach a diagnosis despite 1 week of inpatient investigation.

   Fever of Unknown Origin (FUO) | Medscape

   emedicine.medscape.com/article/217675-overview

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   How do you know if you have a fever of unknown origin?

   • The history can provide important clues to fever of unknown origin (FUO) due to zoonoses, malignancies, and inflammatory/immune disorders. In adults with FUO, inquire about symptoms involving all major organ systems and obtain a detailed history of general symptoms (eg, fever, weight loss, night sweats, headaches, rashes).

   Fever of Unknown Origin (FUO) Clinical Presentation - Medscape

   emedicine.medscape.com/article/217675-clinical

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   How many cases of fever of unknown origin are there?

   • Mansueto P, Di Lorenzo G, Rizzo M, Di Rosa S, Vitale G, Rini G, Mansueto S, Affronti M. Fever of unknown origin in a Mediterranean survey from a division of internal medicine: report of 91 cases during a 12-year-period (1991-2002). Intern Emerg Med. 2008 Sep;3(3):219-25. [PubMed]

   Fever of Unknown Origin - StatPearls - NCBI Bookshelf

   www.ncbi.nlm.nih.gov/books/NBK532265/

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   What is a febrile illness without an etiology?

   • Literature review current through: Aug 2024. This topic last updated: Nov 28, 2023. Clinicians commonly refer to a febrile illness without an initially obvious etiology as fever of unknown origin (FUO). However, most febrile illnesses either resolve before a diagnosis can be made or develop distinguishing characteristics that lead to a diagnosis.

   Fever of unknown origin in adults: Evaluation and management

   www.uptodate.com/contents/fever-of-unknown-origin-in-adults-evaluation-and-management

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   Can Empiric antimicrobial therapy treat fever of unknown origin?

   • Empiric antimicrobial therapy has not been shown to be effective in the treatment of fever of unknown origin and therefore should be avoided except in patients who are neutropenic, immunocompromised, or critically ill. Fever of unknown origin (FUO) in adults poses one of the greatest diagnostic challenges in medicine.

   Fever of Unknown Origin in Adults - AAFP

   www.aafp.org/pubs/afp/issues/2022/0200/p137.html

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   Do specific fever patterns correlate with specific diseases?

   • In general, specific fever patterns do not correlate strongly with specific diseases. Notable exceptions include classic recurrent fevers, as follows: Collagen vascular and autoimmune diseases can manifest as FUO if the fever precedes other, more specific manifestations (eg, arthritis, pneumonitis, renal involvement). Weight loss is not unusual.

   Fever of Unknown Origin (FUO) Clinical Presentation - Medscape

   emedicine.medscape.com/article/217675-clinical

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10. emedicine.medscape.com › article › 217675-Fever of Unknown Origin (FUO): Practice Essentials ... - Medscape

    emedicine.medscape.com › article › 217675-

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    Apr 10, 2024 · The syndrome of fever of unknown origin (FUO) was defined in 1961 by Petersdorf and Beeson as the following: (1) a temperature greater than 38.3°C (101°F) on several occasions, (2)...