Prevotella species are Gram-negative anaerobic bacilli mainly involved in oral cavity infections. We report a rare case of bacteremia due to P. oris of probable hepatic origin. A 70-year-old man with a history of diabetes mellitus was admitted for general malaise, fever and dyspnea. The patient was admitted to the ICU due to septic shock. Two sets of blood cultures yielded a pure culture of an anaerobic microorganism identified as P. oris by MALDI-TOF MS. The same microorganism was isolated from a hepatic abscess drainage. Only resistance to penicillin was documented. Treatment with piperacillin-tazobactam and levofloxacin was administered, and the patient was discharged following his recovery.
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