“…However, 9 of those species are isolated from human samples, which are B. linens, B. casei, B. epidermidis, B. iodinum, B. mcbrellneri, B. otitis, B. paucivorans, B. sanguinis, and B. massiliense [2] . The most common organism is B. casei , reported in 9 out of 20 cases since the first case was discovered in 1991 [3] . In this case report, B. luteolum has been highlighted in an immunocompromised patient.…”