RT Journal Article SR Electronic T1 Brain abscess caused by Citrobacter koseri infection in an adult JF Neurosciences Journal JO Neurosciences (Riyadh) FD Prince Sultan Military Medical City SP 170 OP 172 DO 10.17712/nsj.2015.2.20140749 VO 20 IS 2 A1 Liu, Heng-Wei A1 Chang, Chih-Ju A1 Hsieh, Cheng-Ta YR 2015 UL http://nsj.org.sa/content/20/2/170.abstract AB Citrobacter koseri is a gram-negative bacillus that causes mostly meningitis and brain abscesses in neonates and infants. However, brain abscess caused by Citrobacter koseri infection in an adult is extremely rare, and only 2 cases have been described. Here, we reported a 73-year-old male presenting with a 3-week headache. A history of diabetes mellitus was noted. The images revealed a brain abscess in the left frontal lobe and pus culture confirmed the growth of Citrobacter koseri. The clinical symptoms improved completely postoperatively.