Corynebacterium is an aerobically growing, asporogenous, non-partially acid-fast, irregularly shaped gram-positive rod that colonizes the skin and mucous membranes. Since it is frequently isolated from the ocular surface of healthy persons, it is usually recognized as non-pathogenic, even when isolated from eyes with keratitis. However, recent reports indicate the etiologic role of this organism. We report the management of a case of keratitis related to fluoroquinolone-resistant Corynebacterium and discuss the pathogenicity of fluoroquinolone-resistant Corynebacterium.
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