[Sepsis caused by Raoultella ornithinolytica in an immunocompetent patient].

Raoultella ornithinolytica is a species of gram-negative encapsulated and aerobic bacteria belonging to the family Enterobacteriaceae and is mainly found in fish. The most distinctive feature of this bacterium is the ability to convert histidine to histamine; therefore, the consumption of decomposing fish infected by R. ornithinolytica causes rashes, diarrhea, flushing, sweating and vomiting. This food poisoning is also called histamine fish poisoning; however, human infections with R. ornithinolytica are extremely rare and have so far only affected patients with diseases suppressing the immune system. The current case report describes for the first time sepsis with evidence of bloodstream infection by R. ornithinolytica in an immunocompetent male patient and the successful antibiotic treatment.