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Primary and secondary herpes simplex uveitis in rabbits
Survey of Ophthalmology
|September 1, 1976
Summary
Primary herpes simplex uveitis results from live virus infection. Secondary (recurrent) uveitis in rabbits is triggered by immunological responses, not active virus, due to persistent antibodies.
Area of Science:
- Ophthalmology
- Virology
- Immunology
Background:
- Herpes simplex virus (HSV) can cause uveitis, an inflammation of the eye's uveal tissue.
- Understanding the mechanisms of primary and recurrent HSV uveitis is crucial for effective treatment.
Purpose of the Study:
- To differentiate the mechanisms of primary and secondary herpes simplex uveitis in a rabbit model.
- To investigate the role of live virus versus immunological factors in recurrent ocular inflammation.
Main Methods:
- Induction of primary uveitis via intravitreal injection of live HSV in rabbits.
- Induction of secondary uveitis by reinjecting HSV into recovered eyes.
- Monitoring disease onset and progression.
- Attempting to isolate infectious HSV from ocular tissues.
- Assessing the presence of anti-HSV neutralizing antibodies.
Main Results:
- Primary uveitis developed gradually following live HSV injection.
- Secondary uveitis manifested immediately upon HSV reinjection.
- Only live HSV caused primary uveitis, while both live and inactivated HSV induced secondary uveitis.
- Infectious HSV was isolated from primary uveitis eyes but not from secondary uveitis eyes.
- Persistent anti-HSV antibodies were detected in eyes with secondary uveitis.
Conclusions:
- Primary herpes simplex uveitis is directly caused by live HSV infection of uveal tissue.
- Secondary (recurrent) herpes simplex uveitis appears to be driven by HSV-induced immunological mechanisms, potentially exacerbated by persistent intraocular antibodies.