Microbial keratitis due to infection with Citrobacter freundii: A rare entity

Abstract

We report a unique case of Citrobacter freundii keratitis in a 35-year-old male presented with a paracentral corneal ulcer secondary to injury with a tile particle. Clinically, it seemed like a fungal ulcer. However, the bacterial culture was positive for Citrobacter freundii, which responded to topical amikacin and ceftazidime. Citrobacter freundii is a facultative anaerobic gram-negative bacterium belonging to the family of Enterobacteriaceae being associated with external eye infections; while this is another report of it being associated with microbial keratitis.