Misidentification of Cutibacterium namnetense as Cutibacterium acnes among clinical isolates by MALDI-TOF VitekMS: usefulness of gyrB sequencing and new player in bone infections

Summary of Novel Bacterial Isolates Derived from Human Clinical Specimens and Nomenclature Revisions Published in 2018 and 2019

“…The latter anaerobic Gram-positive bacillus, whose taxonomy revision to Cutibacterium namnetense is listed in Table 2, was documented as the etiologic agent in 1% of osteoarticular infections caused by Cutibacterium spp. and can be misidentified as Cutibacterium acnes even by advanced diagnostic modalities such as MALDI-TOF MS (98). Ruffier d'Epenoux et al used a gyrB sequencing method, a tool that is likely available only in reference laboratories, to differentiate C. namnetense from C. acnes (98).…”

“…and can be misidentified as Cutibacterium acnes even by advanced diagnostic modalities such as MALDI-TOF MS (98). Ruffier d'Epenoux et al used a gyrB sequencing method, a tool that is likely available only in reference laboratories, to differentiate C. namnetense from C. acnes (98). The latter scenario brings to light a recent change in requirements for defining novel taxa in IJSEM.…”