Abscess caused by Citrobacter koseri infection: three case reports and a literature review.

In this report, we present 3 cases of abscess caused by Citrobacter koseri. All infected patients recovered after initial empirical antibiotic treatment and percutaneous drainage of the abscess. We reviewed the literature and found 9 adult cases of C. koseri abscess. Most of these patients recovered after timely antibiotic treatment and drainage.