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  1. Aug 14, 2023 · The causes of fever of unknown origin (FUO) are often common conditions presenting atypically. The list of causes is extensive, and it is broken down into broader categories, such as infection, noninfectious inflammatory conditions, malignancies, and miscellaneous. Noninfectious Inflammatory Causes of FUO.

    • Ilona Brown, Nancy A. Finnigan
    • 2023/08/14
    • 2021
  2. 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 diagnosis is...

  3. Feb 2, 2022 · Up to 51% of cases of FUO, even in the current era, remain undiagnosed. 5 The likelihood of undiagnosed cases may be greater in higher-income regions, an association that is probably due to...

  4. Petersdorf and Beeson 1 first coined the term fever of unknown origin in 1961 and explicitly defined it as a temperature higher than 38.3°C on several occasions and lasting longer than 3 weeks, with a diagnosis that remains uncertain after 1 week of investigations in hospital.

    • Ophyr Mourad, Valerie Palda, Allan S. Detsky
    • 2003
  5. Apr 4, 2021 · There are over 200 causes of fever of unknown origin (FUO), and although parasitic infection is an increasingly uncommon cause, a definitive diagnosis remains important to ensure rapid treatment and to prevent adverse sequelae through delay.

    • Huiting Liu, Hongwei Fan, Xiaoming Huang, Yang Jiao
    • 2 (33.3)
    • 2021
    • 4 (66.7)
  6. Fever of Unknown Origin / microbiology. Humans. Fever of unexplained (or unknown) origin (FUO) remains a relevant clinical problem even with modern diagnostic methods. In addition to the classical definition, new categories of FUO describe different clinical situations: nosocomial FUO, FUO in neutropenic/immundeficient patients and FUO in ...

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  8. 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.