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The Journal of the Japanese Society for Clinical Microbiology |
Biblioraphy Information
| ArticleTitle |
A case of diverticulitis with bacteremia caused by Raoultella ornithinolytica |
| Language |
J |
| AuthorList |
Shunsuke Uno1), Ryota Hase1), Kohei Hashimoto2), Akihiro Toguchi2), Yoshihito Otsuka2), Naoto Hosokawa1) |
| Affiliation |
1) Department of Infectious Diseases, Kameda Medical Center
2) Department of Laboratry Medicine, Kameda Medical Center |
| Publication |
J.J.C.M.: 26 (2), 136-140, 2016 |
| Received |
August 7, 2015 |
| Accepted |
November 27, 2015 |
| Abstract |
Raoultella ornithinolytica formerly known as Klebsiella ornithinolytica has been isolated from the guts of fish or ticks and from estuarine water, and has been shown to produce histamine that contributes to fish poisoning. However, human infections caused by R. ornithinolytica have not been reported frequently. Here we report the first case of diverticulitis with bacteremia caused by R. ornithinolytica. An 88-year-old male presented to the emergency department with general malaise and hematochezia. He was diagnosed with diverticulitis using abdominal computed tomography. Gram-negative rods were isolated from the blood culture and confirmed as R. ornithinolytica using MicroScan WalkAway 96 SI (Beckman Coulter) and 16S rRNA gene sequence analysis. According to previous reports, conventional phenotypic identification systems may misidentify this organism. In addition, both 16S rRNA gene sequence analysis and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) do not always provide an accurate confirmation of this organism. Therefore, R. ornithinolytica cases may have been underreported. We conclude that it is important to identify R. ornithinolytica accurately and accumulate more cases to elucidate its clinical characteristics. |
| Keywords |
Raoultella ornithinolytica, Klebsiella ornithinolytica, 16S rRNA, MALDI-TOF |
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