Experimental disciform edema and necrotizing keratitis in the rabbit

Area of Science:

• Ophthalmology
• Virology
• Immunology

Background:

• Herpes simplex virus (HSV) is a common cause of infectious keratitis.
• Herpetic stromal keratitis (HSK) can lead to significant vision impairment.
• Animal models are crucial for studying HSK pathogenesis and evaluating treatments.

Purpose of the Study:

• To describe the development of experimental disciform edema and necrotizing keratitis in rabbits.
• To characterize the clinical and histological features of HSV-induced keratitis in an animal model.
• To assess the similarities between this experimental model and human HSK.

Main Methods:

• Intrastromal inoculation of the RE strain of herpes simplex virus into rabbit corneas.
• Clinical observation of corneal changes including edema, opacification, and neovascularization.
• Histological examination of corneal tissues to identify inflammatory cell infiltration.

Main Results:

• Experimental keratitis developed following viral inoculation, progressing through conjunctivitis and epithelial keratitis.
• Stromal edema, opacification, and neovascularization peaked between days 7-22, resolving to subepithelial opacities by day 29.
• Necrotizing keratitis occurred in some eyes, with histological findings showing characteristic immune cell infiltration.

Conclusions:

• The rabbit model effectively replicates key features of human herpetic stromal keratitis.
• This model provides valuable insights into the pathogenesis and immune response in HSK.
• Further research using this model can aid in developing novel therapeutic strategies for HSK.