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Phlyctenular Keratoconjunctivitis and Marginal Staphylococcal Keratitis
Key Concepts Phlyctenular keratoconjunctivitis (PKC) and staphylococcal marginal keratitis are both hypersensitivity reactions to a microbial antigen. PKC is most likely a type IV hypersensitivity reaction (cell mediated) that causes nodular lesions on the conjunctiva and cornea. Staphylococcal marginal keratitis…