Evaluation of presumptive identification of Enterobacterales using CHROMagar Orientation medium and rapid biochemical tests

Hirofumi Ohtaki, Akifumi Takahashi, Ayumi Niwa, Jun Yonetamari, Asami Nakayama, Tomokazu Kuchibiro, Hirotoshi Ohta, Hiroyasu Ito, Hisashi Baba, Nobuo Murakami, Kiyofumi Ohkusu

研究成果: Article査読

抄録

Background: The use of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry is gradually spreading among large-scale laboratories; however, this method is impractical for small-scale laboratories. In laboratories without access to these rapid identification methods, problems related to them remain unsolved. In this study, we aimed to develop a rapid and inexpensive method to presumptively identify Enterobacterales using CHROMagar Orientation medium. Methods: The algorithm for presumptive identification of Enterobacteriaceae using CHROMagar Orientation medium was based on our previous studies. Modified property tests for indole, lysine decarboxylase, ornithine decarboxylase, and hydrogen sulfide were performed to evaluate the differentiation of the bacterial species. Results: Using the type strains and clinical isolates, it was possible to conduct the property tests at a low cost, within 4 hours. The spot indole test was performed without any nonspecific reactions for the bacteria forming colored colonies. The presumptive identification of bacteria was thereby possible within 24 hours after specimen submission. Conclusion: All these results suggest that the rapid presumptive identification of Enterobacterales is possible with this new identification method using CHROMagar Orientation medium. This is therefore a prompt and economical method that can be used in routine laboratory work.

本文言語English
論文番号e23453
ジャーナルJournal of Clinical Laboratory Analysis
34
10
DOI
出版ステータスPublished - 01-10-2020
外部発表はい

All Science Journal Classification (ASJC) codes

  • 免疫アレルギー学
  • 血液学
  • 公衆衛生学、環境および労働衛生
  • 臨床生化学
  • 医療検査技術
  • 生化学、医学
  • 微生物学(医療)

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