Identification of <i>Aerococcus</i> spp. in blood cultures: Report of bacteremia caused by <i>Aerococcus</i> spp. at our hospital
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- YAGISAWA Hitomi
- Department of Clinical Laboratory, Tachikawa Hospital
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- WATANABE Mako
- Department of Clinical Laboratory, Tachikawa Hospital
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- OOE Tomohiro
- Department of Clinical Laboratory, Tachikawa Hospital
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- YOSHIDA Naoko
- Department of Tropical Medicine and Parasitology, Juntendo University School of Medicine
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- KOH Hidefumi
- Division of Pulmonary Medicine, Department of Internal Medicine, Tachikawa Hospital
Bibliographic Information
- Other Title
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- 血液培養検査から検出された<i>Aerococcus</i>属菌の同定―当院で経験した<i>Aerococccus</i>属菌による菌血症の報告―
Abstract
<p>Aerococcus spp. are facultative anaerobic gram-positive cocci that often cause urinary tract infections in older men with a history of urological diseases. These species have been reported to rarely cause bacteremia or endocarditis. In our hospital, we encountered three cases of bacteremia in older men with urological diseases; one of these cases was infective endocarditis. Aerococcus spp. have the same characteristics as Staphylococcus spp. on Gram staining of blood culture media. However, on blood agar medium, they show alpha-hemolytic colonies and resemble alpha-hemolytic Streptococcus and Enterococcus spp. Therefore, Aerococcus spp. may be misidentified as α-Streptococcus. In addition, during the use of identification test kits and automatic analyzers, some strains are difficult to identify owing to insufficient databases of these instruments. In fact, in all three cases in our hospital, the results of the urine culture performed by an outsourced laboratory identified the causative organisms as Streptococcus spp. However, they were all re-identified as Aerococcus spp. using an automatic analyzer, an identification kit such as API20Strep, and a mass spectrometer. For the identification of Aerococcus spp., a thorough understanding of their characteristics is important. Furthermore, identification should be confirmed by MALDI-TOF-MS or genetic testing for future accumulation of information.</p>
Journal
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- Japanese Journal of Medical Technology
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Japanese Journal of Medical Technology 72 (4), 643-648, 2023-10-25
Japanese Association of Medical Technologists
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Keywords
Details 詳細情報について
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- CRID
- 1390579377437905408
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- ISSN
- 21885346
- 09158669
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed