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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...

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...

Encephalitis ll: Pathophysiology

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...

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...

Hepatic Encephalopathy

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...

Viral Hepatitis I: Introduction

Viral Hepatitis I: Introduction

Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...

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Updated: May 19, 2026

A Multiplex Serological Assay for the Detection of Antibody Responses to Arboviruses

A Multiplex Serological Assay for the Detection of Antibody Responses to Arboviruses

Published on: November 4, 2025

Human arboviral encephalitis.

Robert S Rust¹

¹Department of Neurology, University of Virginia, Charlottesville, VA 22908-0394, USA. rsr6f@virginia.edu

Seminars in Pediatric Neurology

|August 15, 2012

Summary

Arboviral encephalitis poses a significant global threat to neurological health. This review covers key arboviral encephalitides, their increasing prevalence, and potential as biological warfare agents.

Area of Science:

Neurology
Infectious Diseases
Public Health

Background:

Arboviral illnesses are a major international threat to neurological health.
Japanese encephalitis alone caused 50,000 annual cases pre-vaccination, with high mortality and morbidity.
Increasing prevalence of arboviruses, linked to climate change, raises global health concerns.

Purpose of the Study:

To review the ecology, pathophysiology, diagnosis, management, and outcomes of significant arboviral encephalitides.
To focus on North American arboviral encephalitis forms while including globally important types.
To address the emerging threat of arboviruses as potential biological warfare agents.

Main Methods:

Literature review of arboviral encephalitis.

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Ecological and epidemiological data analysis.

Clinical and public health impact assessment.

Main Results:

Arboviral encephalitis remains a critical neurological health concern.
Factors like climate change may increase arboviral disease prevalence.
Certain arboviruses present potential biological warfare risks.

Conclusions:

Arboviral encephalitis requires ongoing surveillance and management strategies.
Understanding arboviral ecology and pathophysiology is crucial for prevention and control.
Preparedness for arboviral threats, including those from biological warfare, is essential.