title: Necrotizing ring ulcer of the cornea caused by exogenous Listeria monocytogenes serotype IV b infection.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003320:Corneal Ulcer / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D008089:Listeria monocytogenes / Q000145:classification; D008088:Listeriosis; D009336:Necrosis; D012703:Serotyping