Related Experiment Video
Updated: May 14, 2026

Immunohistochemistry Test for the Lyssavirus Antigen Detection from Formalin-Fixed Tissues
Published on: October 26, 2021
[Immunohistochemistry in a case of EBV encephalitis]
Edenilson E Calore1, Nilda M Pérez, José F Martins
1Departamento de Patología, Instituto de Infectología Emilio Ribas, Sao Paulo, Brasil. eecalore@hotmail.com
Abstract:
EBV can produce a broad range of CNS disorders such as demyelinative diseases, acute encephalitis, cerebellar ataxia, myelitis, or meningitis. The role of EBV itself in acute encephalitis is not completely clear. Presently we described a 4 years old boy with EBV encephalitis that deceased after respiratory distress and cardio-respiratory arrest. At autopsy the most important changes in the brain were focal sub cortical peri-vascular mononuclear inflammation of the cerebral vessels. EBV antigens were demonstrated by immunohistochemistry in some cells of the vascular walls and in some glial cells of the brain. As expected this indicates a predominantly cellular response in the brain. The presence of EBV antigens by immunohistochemistry associated to a scarce inflammatory infiltrate supports the hypothesis that EBV itself plays a major role in the pathogenesis of EBV encephalitis.
Insights
Epstein-Barr virus (EBV) encephalitis is a rare but severe condition. Autopsy findings in a child with EBV encephalitis revealed EBV antigens in brain tissues, supporting its direct role in pathogenesis.
Area of Science:
- Neurology
- Virology
- Pathology
Background:
- Epstein-Barr virus (EBV) is associated with various central nervous system (CNS) disorders.
- The specific role of EBV in acute encephalitis remains unclear.
Observation:
- A case of a 4-year-old boy with fatal EBV encephalitis is presented.
- Autopsy revealed focal, subcortical, perivascular mononuclear inflammation in cerebral vessels.
- EBV antigens were detected via immunohistochemistry in vascular wall cells and glial cells.
Findings:
- Immunohistochemical detection of EBV antigens in brain tissue.
- Evidence suggests a predominantly cellular immune response within the brain.
- The findings support EBV's direct role in the pathogenesis of EBV encephalitis.
Implications:
- This case highlights the potential severity of EBV encephalitis.
- Understanding EBV's direct role aids in diagnosing and potentially treating CNS infections.
- Further research into EBV's neuropathogenesis is warranted.
Related Concept Videos
Encephalitis ll: Pathophysiology
Encephalitis l: Introduction
Immunogold Electron Microscopy
Arboviral Encephalitis

