Liver Abscess Caused by Pannonibacter phragmitetus: Case Report and Literature Review

BACKGROUND Bacterial hepatic abscess is a common occurrence in developing countries, which is mostly caused by Klebsiella pneumoniae and Escherichia coli. Pannonibacter phragmitetus is a Gram-negative alkali-tolerant bacillus that exists in the natural environment. Human infection by this bacterium is rare, with only four cases reported. METHOD We presented one of these cases with a bacterial liver abscess by a polymicrobial infection involving P. phragmitetus and Streptococcus oralis, with P. phragmitetus being the predominate isolate. RESULT AND DISCUSSION Our strain of P. phragmitetus was resistant to more antibiotics than the other reported two strains. This case further verified the infectivity of P. phragmitetus.