Clinical characteristics of .

was first reported in 2000. Its characteristics such as isolation frequency, specimen types, and antimicrobial susceptibilities are poorly understood, because identification is difficult using conventional methods. We performed a retrospective observational study of 13 and 317 strains of and , respectively, isolated from consecutive patients at Nagoya University Hospital from January 2017 to December 2018. We analyzed patients' backgrounds, types of specimens, and antimicrobial susceptibilities. Antimicrobial susceptibilities were compared with those of . The frequencies of isolation of and were 3.9% and 96%, respectively. was not detected in specimens associated with mucous membranes, such as sputum and secretions from the craniocervical region, which were frequent for . was mainly detected in the skin (61.5%). All isolates were susceptible to anti-MRSA drugs, as well as to numerous other antibiotics, including those that are orally administered. For example, was significantly more susceptible to penicillin G, ceftriaxone, and ciprofloxacin than (respective susceptibilities: 66.7% vs 5.4%, 50.0% vs 4.0%, 66.7% vs 5.9%). There was no significant difference between meropenem and erythromycin, although susceptibility to each was relatively high (100.0% vs 31.7%, 50.0% vs 11.9%). was susceptible to numerous orally administered antibiotics and more susceptible to antimicrobial drugs than . was detected less frequently than and was infrequently detected in specimens associated with mucous membranes. These characteristics will aid the selection of optimal antimicrobial therapies.