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The Journal of the Japanese Society for Clinical Microbiology |
Biblioraphy Information
| ArticleTitle |
Detection of Staphylococcus argenteus at our facility and bacteriological studies |
| Language |
J |
| AuthorList |
Yumi Inoue1), Tamami Shintani1), Kazushi Ehara1), Shiho Takahashi1), Takuya Kosako1), Shingo Kobayashi1), Akihiko Uematsu1), Nobuya Sakagami1), Kiyofumi Okusu2) |
| Affiliation |
1) Department of Microbiology, Division of Infectious Diseases and Manual Laboratories, SRL Corporation
2) Department of Microbiology, Tokyo Medical University |
| Publication |
J.J.C.M.: 35 (3), 249-253, 2025 |
| Received |
March 18, 2025 |
| Accepted |
May 22, 2025 |
| Abstract |
Staphylococcus argenteus is a newly registered organism in 2015, but it is sometimes misidentified because of its similarity to Staphylococcus aureus. Recently, S. argenteus has been easily identified using mass spectrometry, so we analyzed 2,350 S. aureus isolates from patient materials in June 2021 to determine the isolation status of S. argenteus at our institution. The isolates were grown on blood agar medium, and differences in coloration were compared with those of S. aureus producing yellow pigment. Of the 2,350 strains, 2,330 (99.1%) were S. aureus and 20 (0.9%) were S. argenteus. Respiratory specimens were the most common by specimen type, accounting for 9 cases (45.0%), and by age, 15cases (75.0%) were from persons in their 60s or older, showing a conspicuous tendency to detect S. aureus among the elderly. Although S. argenteus colonies were white in all cases, it is difficult to distinguish S. argenteus from S. aureus by color because white S. aureus also occurs in many cases. The isolation of S. argenteus at our own institution showed that S. argenteus was often detected in elderly males and in respiratory materials. However, the number of isolates was small, so the results of this analysis are considered to be unreliable. |
| Keywords |
Staphylococcus argenteus, Staphylococcus aureus complex |
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