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Updated: Jun 8, 2026

A Murine Model of Dengue Virus-induced Acute Viral Encephalitis-like Disease
Published on: April 28, 2019
[Influenza-associated encephalopathy]
Tatsuharu Sato1, Hiroyuki Moriuchi
1Department of Pediatrics, Nagasaki University Hospital.
Insights
Acute encephalopathy, a severe complication of pediatric viral infections like influenza, involves rapid brain damage. This review compares pandemic AH1N1 flu-associated encephalopathy with seasonal flu-associated cases.
Area of Science:
- Neurology
- Infectious Diseases
- Pediatrics
Context:
- Acute encephalopathy is a critical complication of pediatric viral infections, particularly influenza.
- It presents as rapid brain damage without direct viral invasion or inflammation.
- Recent classifications categorize it based on clinical and pathogenic features.
Purpose:
- To review the general pathogenesis and classification of acute encephalopathy.
- To compare the epidemiological, clinical, and pathological features of pandemic AH1N1 flu-associated encephalopathy (FAE) with seasonal FAE.
Summary:
- The 2009 AH1N1 influenza pandemic saw numerous reports of acute encephalopathy globally.
- This article provides a comprehensive overview of acute encephalopathy.
- It specifically contrasts pandemic FAE with seasonal FAE, highlighting key differences.
Impact:
- Enhances understanding of influenza-associated encephalopathy, crucial for pediatric critical care.
- Provides insights into the specific characteristics of pandemic versus seasonal influenza complications.
- Informs clinical management and research directions for acute encephalopathy in children.
Abstract:
Acute encephalopathy is one of the most serious complications of pediatrics viral infections including influenza. It is characterized clinically by rapidly progressive brain damage following viral infection, and pathologically by brain edema in the absence of direct invasion of the virus and inflammatory cells. Recently, it has been classified into several categories according to the clinical characteristics and pathogenesis. In 2009, an outbreak of AH1N1 (swine) influenza was discovered in North America and quickly spread worldwide. During this pandemic, a number of patients with acute encephalopathy have been reported from all over the world. This article reviews the pathogenesis and classification of acute encephalopathy in general and the epidemiological, clinical and pathological features of pandemic flu-associated encephalopathy in comparison with those of seasonal flu-associated encephalopathy.
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