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Types of Fever

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:

Increased Body Temperature

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.

Encephalitis l: Introduction

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...

Patterns of Fever

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.

Viral Meningitis

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...

Arboviral Encephalitis

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...

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Updated: Jun 3, 2026

A Murine Model of Dengue Virus-induced Acute Viral Encephalitis-like Disease

A Murine Model of Dengue Virus-induced Acute Viral Encephalitis-like Disease

Published on: April 28, 2019

[Unclear neurological condition and fever].

J G A Magarzo¹, R Fulchini, T Eckle

¹Innere Medizin, Kantonsspital Luzern. jgamagi@hotmail.com

|April 1, 2011

Summary

Tuberculous meningitis can present with unclear neurological symptoms and fever. Characteristic cerebrospinal fluid findings can aid in early diagnosis and prompt treatment, reducing high mortality rates.

Area of Science:

Neurology
Infectious Diseases
Microbiology

Background:

Tuberculous meningitis (TBM) is a severe form of extrapulmonary tuberculosis.
Early diagnosis of TBM is crucial but challenging due to nonspecific clinical presentations.

Observation:

Two elderly patients presented with fever and an unclear neurological condition.
Cerebrospinal fluid (CSF) analysis revealed mononuclear pleocytosis, low glucose, and elevated protein.

Findings:

The observed CSF profile strongly suggested tuberculous meningitis.
Polymerase Chain Reaction (PCR) and CSF culture confirmed the TBM diagnosis.
Diagnosis is often delayed by non-specific initial symptoms.

Implications:

Related Experiment Videos

Last Updated: Jun 3, 2026

A Murine Model of Dengue Virus-induced Acute Viral Encephalitis-like Disease

A Murine Model of Dengue Virus-induced Acute Viral Encephalitis-like Disease

Published on: April 28, 2019

The characteristic CSF formula should prompt immediate antituberculous treatment.
Prompt treatment is essential to mitigate the high mortality associated with TBM.
Recognizing this CSF pattern can improve patient outcomes in suspected TBM cases.