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Herpes simplex encephalitis

B Sköldenberg1

  • 1Department of Infectious Diseases, Karolinska Institute, Danderyd Hospital, Danderyd, Sweden.

Scandinavian Journal of Infectious Diseases. Supplementum
|January 1, 1996
PubMed
Summary

Herpes simplex encephalitis (HSE) is a severe brain infection, often caused by HSV-1. Despite treatment, HSE survivors face lasting neurological issues due to persistent immune responses.

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Area of Science:

  • Neurology
  • Virology
  • Immunology

Background:

  • Herpes simplex encephalitis (HSE) is a critical neurological condition with high mortality and significant long-term disability.
  • Herpes simplex virus type 1 (HSV-1) causes most HSE cases, with HSV-2 implicated in a smaller percentage.
  • While primary infection causes HSE in one-third of patients, many adult cases involve recurrent HSV infections.

Purpose of the Study:

  • To review the pathology, diagnosis, and treatment of herpes simplex encephalitis.
  • To highlight the role of immunopathology and cytokine networks in HSE.
  • To discuss the persistent intrathecal immune activation observed in HSE survivors.

Main Methods:

  • Review of pathological features including acute focal necrotizing encephalitis.
  • Diagnostic techniques such as brain biopsy, CSF analysis for HSV antibodies and DNA, EEG, CT, and MRI.
  • Assessment of treatment efficacy and long-term sequelae of aciclovir therapy.

Main Results:

  • HSE involves HSV-induced neuronal damage and significant immunopathology.
  • Cytokine networks play a crucial role in regulating the immune response during HSE.
  • Diagnostic tools like CSF analysis and neuroimaging are vital for confirming HSE.
  • Aciclovir remains the primary treatment, but mortality and morbidity persist.

Conclusions:

  • Intrathecal cellular and humoral immune activation are persistent features in HSE.
  • Understanding these immune responses is critical for improving outcomes in HSE survivors.
  • Further research into managing the long-term immunological consequences of HSE is warranted.

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