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The Journal of the Japanese Society for Clinical Microbiology |
Biblioraphy Information
| ArticleTitle |
A case of Legionella pneumonia caused by Legionella longbeachae diagnosed by urine antigen test |
| Language |
J |
| AuthorList |
Takuya Ikenari1), Mami Ikemachi1), Noriko Nakanishi2), Shoko Komatsu2), Shinobu Tanaka2), Tasuku Matsuoka3), Kosuke Tokushige4), Kimihide Tada4), Ayako Nimura1), Miho Oto1), Mao Nakano1), Chihiro Koike1), Hiroshi Takekawa1) |
| Affiliation |
1) Department of Clinical Laboratory, Kobe City Nishi-Kobe Medical Center
2) Department of Infectious Diseases, Kobe Institute of Health
3) Department of Respiratory Medicine, Kobe City Medical Center West Hospital
4) Department of Respiratory Medicine, Kobe City Nishi-Kobe Medical Center |
| Publication |
J.J.C.M.: 34 (3), 214-221, 2024 |
| Received |
February 2, 2024 |
| Accepted |
May 27, 2024 |
| Abstract |
We present a case of Legionella pneumonia caused by Legionella longbeachae, which was diagnosed by urinary Legionella antigen test. A 80s old male presented to the hospital with complains of dyspnea. A chest X-ray and chest CT revealed extensive infiltrative shadows, which led to the suspicion of Legionella pneumonia. A positive urine antigen test (RibotestⓇLegionella, Kyokuto Pharmaceutical) and a subsequent sputum culture identified it as L. longbeachae serogroup 1. Because the urine antigen test was not initially intended to detect L. longbeachae, the reactivity of the test was investigated. A comparison of several urine antigen test reagents revealed that only the RibotestⓇLegionella tested in this study was positive. However, the sensitivity was approximately 1/10,000 of that for Legionella pneumophila, so even a negative result could not rule out L. longbeachae infection. Further use of genetic tests is needed in the future because a delayed diagnosis of Legionella pneumoniae could result in lethal consequences. |
| Keywords |
Legionella longbeachae |
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