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Herpes simplex virus brainstem encephalitis in an AIDS patient
R L Hamilton1, C Achim, M R Grafe
1University of California, San Diego, Department of Pathology (Neuropathology), La Jolla, USA.
Clinical Neuropathology
|January 1, 1995
Summary
A virulent herpes simplex virus (HSV) strain caused atypical brainstem demyelination in an AIDS patient. This HSV-1 isolate showed increased neurovirulence and neuroinvasiveness in mice, leading to similar brainstem and cerebellar lesions.
Area of Science:
- Neurology
- Virology
- Immunology
Background:
- Acquired Immune Deficiency Syndrome (AIDS) compromises the immune system, increasing susceptibility to opportunistic infections.
- Herpes Simplex Virus (HSV) can cause severe neurological complications in immunocompromised individuals.
Observation:
- A case of atypical herpes simplex virus infection in the brainstem of an AIDS patient was identified.
- The infection was characterized by demyelination and tropism for oligodendroglia.
Findings:
- Autopsy revealed brainstem demyelination.
- Immunocytochemistry, in situ hybridization, and electron microscopy confirmed HSV presence, identified as HSV type 1.
- The clinical HSV isolate exhibited significantly higher neuroinvasiveness and neurovirulence in mice compared to a laboratory strain (HSV-1 KOS).
- Inoculated mice developed brainstem and cerebellar demyelination.
Implications:
- This virulent HSV-1 strain poses a significant threat for severe neurological disease in AIDS patients.
- The findings highlight the importance of understanding HSV neurovirulence mechanisms in the context of immunodeficiency.
- This case provides insights into atypical HSV presentations and their neuropathological consequences.