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A rabbit model of staphylococcal blepharitis.

B J Mondino, A I Caster, B Dethlefs

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |March 1, 1987
    PubMed
    Summary
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    Hypersensitivity to Staphylococcus aureus cell walls, especially ribitol teichoic acid, may cause staphylococcal blepharitis. This study in rabbits showed immune responses leading to eyelid inflammation and hair loss.

    Area of Science:

    • Ophthalmology
    • Immunology
    • Microbiology

    Background:

    • Staphylococcus aureus is a common cause of bacterial eye infections.
    • Blepharitis, an inflammation of the eyelids, can be associated with S. aureus infections.

    Purpose of the Study:

    • To investigate the role of hypersensitivity to Staphylococcus aureus cell wall antigens in the development of blepharitis.

    Main Methods:

    • Rabbits were immunized with S. aureus cell wall antigens.
    • Topical challenge with viable S. aureus was performed.
    • Clinical signs and histopathology of the eyelids were examined.

    Main Results:

    • Immunized rabbits developed blepharitis with eyelid thickening, erythema, crusting, and hair loss.

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  • Histopathology revealed leukocytic infiltrate and dilated blood vessels.
  • Immune cells identified included neutrophils, macrophages, plasma cells, and lymphocytes.

    • Conclusions:

    • Hypersensitivity to S. aureus cell wall components, particularly ribitol teichoic acid, is implicated in the pathogenesis of staphylococcal blepharitis.
    • The findings suggest an immune-mediated mechanism rather than direct bacterial invasion of deeper tissues.