fever of unknown origin

(FUO) a febrile illness of at least three weeks' duration (some authorities permit a shorter duration), with a temperature of at least 38.3°C on at least three occasions and failure to establish a diagnosis in spite of intensive inpatient or outpatient evaluation (three outpatient visits or three days' hospitalization). Classic fever of unknown origin, as defined by the preceding criteria, is to be distinguished from neutropenic FUO, nosocomial FUO, and that associated with human immunodeficiency virus infection.

Medical dictionary. 2011.

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  • Fever of unknown origin — (FUO), pyrexia of unknown origin (PUO) or febris e causa ignota (febris E.C.I.) refers to a condition in which the patient has an elevated temperature but despite investigations by a physician no explanation has been found. [http://www.ppidonline …   Wikipedia

  • nosocomial fever of unknown origin — a fever of at least 38.3°C occurring on several occasions in a hospitalized patient in whom neither fever nor infection was present on admission, and for which a cause cannot be determined after three days of investigation, including two days of… …   Medical dictionary

  • HIV-associated fever of unknown origin — a fever of at least 38.3°C occurring on several occasions over a period of four weeks of outpatient care or three days of hospitalization in a patient with human immunodeficiency virus infection, and for which a cause cannot be determined after… …   Medical dictionary

  • neutropenic fever of unknown origin — a fever of at least 38.3°C occurring on several occasions in a patient whose neutrophil level is lower than 500/mm3 or is expected to fall below that level within one or two days, and for which a cause cannot be determined after three days of… …   Medical dictionary

  • Fever — (also known as pyrexia, from the Greek pyretos meaning fire, or a febrile response, from the Latin word febris , meaning fever, and archaically known as ague) is a frequent medical sign that describes an increase in internal body temperature to… …   Wikipedia

  • Fever — Although a fever technically is any body temperature above the normal of 98.6 degrees F. (37 degrees C.), in practice a person is usually not considered to have a significant fever until the temperature is above 100.4 degrees F (38 degrees C.).… …   Medical dictionary

  • Origin of AIDS — False color scanning electron micrograph of HIV 1, in green, budding from cultured lymphocyte. AIDS is caused by the Human immunodeficiency virus (HIV), which originated in non human primates in Sub Saharan Africa and was transferred to humans… …   Wikipedia

  • Hyperimmunoglobulinemia D with recurrent fever — (commonly abbreviated as HIDS) is a periodic fever syndrome originally described in 1984 by the internist Prof. Jos van der Meer, then at Leiden University Medical Centre. No more than 300 cases have been described worldwide.FeaturesHIDS is one… …   Wikipedia

  • hospital fever — Ship Ship, n. [OE. ship, schip, AS. scip; akin to OFries. skip, OS. scip, D. schip, G. schiff, OHG. scif, Dan. skib, Sw. skeep, Icel. & Goth. skip; of unknown origin. Cf. {Equip}, {Skiff}, {Skipper}.] 1. Any large seagoing vessel. [1913 Webster]… …   The Collaborative International Dictionary of English

  • jail fever — Ship Ship, n. [OE. ship, schip, AS. scip; akin to OFries. skip, OS. scip, D. schip, G. schiff, OHG. scif, Dan. skib, Sw. skeep, Icel. & Goth. skip; of unknown origin. Cf. {Equip}, {Skiff}, {Skipper}.] 1. Any large seagoing vessel. [1913 Webster]… …   The Collaborative International Dictionary of English

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