Successful treatment of sequence type 2198 uncomplicated bacteremia with a 2-week antibiotic course.

There is a paucity of data on the clinical course and treatment of . Herein, we describe a successfully treated case of bacteremia. A 76-year-old man with lung adenocarcinoma developed bacteremia caused by penicillin-resistant, oxacillin-susceptible , which was identified through mass spectrometry and gene sequencing. He was diagnosed with a peripheral line-associated bloodstream infection and successfully treated with a 2-week course of cefepime, followed by cefazolin, concurrent with intravenous catheter removal. The isolate was positive for and negative for . It was assigned to sequence type 2198 using multilocus sequence typing. Formerly classified as clonal complex 75, became a distinct species in 2015. Its identification has increased owing to widespread mass spectrometer use. Most East and Southeast Asian isolates reported to date are methicillin-susceptible, consistent with the susceptibility pattern of the isolate in our study. Given the potential equivalence in virulence between and , we recommend treating with the same rigor as until further clinical data becomes available.