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Article
November 1984

Vernal ConjunctivitisModel Studies in Guinea Pigs Immunized Topically With Fluoresceinyl Ovalbumin

Author Affiliations

From the Department of Ophthalmology, Scheie Eye Institute, University of Pennsylvania School of Medicine, Philadelphia.

Arch Ophthalmol. 1984;102(11):1683-1688. doi:10.1001/archopht.1984.01040031367029
Abstract

• Repeated topical applications of fluoresceinyl ovalbumin (FL-OA) to the conjunctival sac of guinea pigs sensitized them for conjunctival type 1 hypersensitivity reactions and mast cell degranulation. Guinea pigs infected with Ascaris suum, with high titers of circulating anti-A suum IgE and IgG1 antibody, also produced conjunctival type 1 reactions on topical challenge with A suum antigen. These reactions were no more intense than those of animals topically sensitized and challenged with FL-OA, which in some instances had no detectable serum homocytotropic antibody. Persistently reactive animals that had undergone repeated type 1 conjunctival reactions had histological findings (eg, papillary changes with extensive epithelial eosinophil infiltrates, epithelial thickening or thinning, numerous goblet cells, subepithelial lymphoid cell infiltrates, and new vessel formation) resembling those of human atopic vernal conjunctivitis.

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