A 70-year old women was hospitalised for coronary angiography. In her history there were coronary artery disease, cerebrovascular attack and coronary by-pass surgery 5 years ago. On the fourth day after hospitalisation her fever increased and after taking blood cultures therapy started with 6 g/day ampicillin. Despite antibiotic therapy the fever did not decrease and the patient was transferred to the infectious diseases department. From separate two blood cultures Rahnella aquatilis was isolated. According to antibiotic sensitivity tests, levofloxacin 500 mg/day was added to the therapy. On the second day of the combination therapy the fever decreased. Control blood cultures were negative and the patient was discharged on the 14th day. In this article a bacteraemia case caused by Rahnella aquatilis is presented and the literature is reviewed.