Cerebral abscess caused by Citrobacter koseri: A case report and review of the literature

Abstract

Citrobacter koseri is a Gram-negative bacillus of the Enterobacteriaceae family, formerly known as Citrobacter diversus. While this pathogen is known to cause severe infections in neonates, cerebral abscesses due to C. koseri in adults are exceptionally uncommon. We present a rare case of a brain abscess in an elderly man caused by C. koseri, successfully treated with ceftriaxone, resulting in a favorable clinical outcome.