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Updated: Oct 2, 2026

A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy
Published on: July 12, 2021
The pathogenesis of febrile seizures: is there a role for specific infections?
J H van Zeijl1, R A Mullaart, J M D Galama
1Department of Medical Microbiology, Public Health Laboratory Friesland, PO Box 21020, 8900 JA Leeuwarden, The Netherlands. jan.van.zielj@lvf.nl
Abstract:
Although fever is regarded as the main trigger in the pathogenesis of febrile seizures (FS), it is not supposed to be the unique causative factor. In FS, there is a strong familial predisposition. This does not exclude infections as a causative factor because subtle genetic polymorphisms have been demonstrated to affect the course of infections. We review the literature on: (1) the role of fever, especially the height of temperature, its cause, and metabolic effects induced by temperature; (2) the role of heredity; (3) the role of cytokines which play a role in the induction of fever; and (4) the role of type of infection, with emphasis on newly identified agents and improved diagnostic techniques. With modern molecular techniques such as PCR, viruses have been detected in the CSF far more often than previously thought, even in the absence of pleocytosis of the CSF. This makes it difficult to distinguish FS from acute encephalitis. FS may be caused by neuroinvasion or intracerebral activation of viruses. Further studies should focus on these options because therapeutic intervention is possible and may prevent late sequelae such as recurrent FS and subsequent epilepsy.
Insights
Febrile seizures (FS) involve more than just fever, with genetics and infections playing key roles. Understanding these factors, including viral neuroinvasion, is crucial for preventing epilepsy.
Area of Science:
- Neurology
- Pediatrics
- Infectious Diseases
Background:
- Febrile seizures (FS) are commonly triggered by fever, but not solely caused by it.
- A strong familial predisposition exists for FS, suggesting a genetic component.
- Genetic polymorphisms can influence infection severity, linking genetics and infections in FS pathogenesis.
Purpose of the Study:
- To review the multifaceted causes of febrile seizures.
- To explore the roles of fever, heredity, cytokines, and infection types in FS.
- To highlight the diagnostic challenges and potential mechanisms of viral involvement in FS.
Main Methods:
- Literature review focusing on fever, genetics, cytokines, and infection.
- Analysis of modern diagnostic techniques, including PCR for viral detection in CSF.
- Examination of the distinction between FS and acute encephalitis.
Main Results:
- Fever's height, cause, and metabolic effects are important factors in FS.
- Heredity and cytokines significantly contribute to FS development.
- Advanced diagnostics reveal frequent viral detection in CSF, complicating FS vs. encephalitis differentiation.
Conclusions:
- FS pathogenesis is complex, involving fever, genetic predisposition, and infections.
- Viral neuroinvasion or intracerebral activation may cause FS.
- Further research into these viral mechanisms is vital for therapeutic interventions to prevent epilepsy.
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