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Related Concept Videos

Types of Fever01:25

Types of Fever

Fever can be triggered by several factors, including infections, nervous system disorders, certain cancers, blood diseases like leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, and allergic reactions.
Here are the different types of fever:
Patterns of Fever01:26

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.
Increased Body Temperature01:25

Increased Body Temperature

A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in response to an infection or illness.
Methods of reducing fever01:22

Methods of reducing fever

The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
Pharmacological Methods of Reducing Fever:
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
Yellow Fever01:18

Yellow Fever

Yellow fever is a viral hemorrhagic disease caused by the yellow fever virus (YFV), a member of the Flaviviridae family. It is transmitted primarily by Aedes and Haemagogus mosquitoes in tropical and subtropical regions of Africa and South America. After transmission through a mosquito bite, the virus initially replicates in skin-resident immune cells such as dendritic cells and macrophages. These cells then migrate to the lymph nodes, where viral replication increases, eventually leading to...

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Related Experiment Video

Updated: Jun 28, 2026

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay
07:23

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay

Published on: June 9, 2011

Fever of unknown origin.

John Williams1, Richard Bellamy

  • 1Department of Infection and Travel Medicine, James Cook University Hospital, Middlesbrough.

Clinical Medicine (London, England)
|November 4, 2008
PubMed
Summary
This summary is machine-generated.

Fever of Unknown Origin (FUO) often stems from common diseases presenting unusually. Diagnosis relies on thorough patient history, repeated examinations, and targeted medical investigations.

Related Experiment Videos

Last Updated: Jun 28, 2026

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay
07:23

Detection of Infectious Virus from Field-collected Mosquitoes by Vero Cell Culture Assay

Published on: June 9, 2011

Area of Science:

  • Internal Medicine
  • Diagnostic Medicine

Background:

  • Fever of Unknown Origin (FUO) presents a diagnostic challenge in clinical practice.
  • Identifying the etiology of FUO is crucial for effective patient management.

Purpose of the Study:

  • To outline the diagnostic approach for Fever of Unknown Origin.
  • To emphasize the common origins of FUO.

Main Methods:

  • Review of potential causes and diagnostic strategies for FUO.
  • Highlighting the importance of clinical history and physical examination.
  • Focusing on targeted investigations based on initial findings.

Main Results:

  • Most FUO cases arise from atypical presentations of common diseases.
  • Rare or exotic diseases are infrequent causes of FUO.
  • Systematic diagnostic procedures are essential.

Conclusions:

  • A meticulous patient history and repeated physical examinations are paramount for FUO diagnosis.
  • Targeted investigations, guided by clinical findings, are key to uncovering the cause of FUO.
  • The diagnostic yield is maximized through a combination of thorough clinical assessment and judicious testing.