一项用于优化MALDI-TOF MS识别丝状真菌的比较研究
De Vera Mae Jeraldine1, Laffut Wim2, Van Even Ellen2
1Heilig Hart Algemeen Ziekenhuis Lier, Mechelsestraat 24, 2500, Lier, Belgium. Maejeraldine.devera@student.kuleuven.be.
概括
选择性培养基对于使用MALDI-TOF MS.精确识别真菌至关重要. 结合MBT Bruker和MSI数据库,可以提高各种真菌物种的识别成功.
科学领域:
- 医学真菌学 医学真菌学
- 微生物学 微生物学
- 质谱测量质量谱测量
背景情况:
- 飞行质谱的矩阵辅助激光脱吸/电离时间 (MALDI-TOF MS) 是一种强大的微生物识别工具.
- 优化培养基和蛋白质提取对于使用MALDI-TOF MS.准确识别真菌至关重要.
研究的目的:
- 通过MALDI-TOF MS.来比较三种商业培养基的真菌识别性能.
- 评估两种蛋白质提取方法 (直接转移与乙醇-酸提取) 与MALDI-TOF MS.一起进行.
- 评估两个不同的细丝真菌库 (MBT Bruker和MSI) 的有效性,用于MALDI-TOF MS识别.
主要方法:
- 这些真菌样本是在萨博劳德德克斯特酸 (SDA),ID真菌板介质 (IDFP) 和萨博劳德 gentamicin chloramphenicol 2 agar (SGC2) 上培养的.
- 使用直接转移 (DT) 和乙醇-甲酸提取 (EEP) 方法进行了蛋白质提取.
- MALDI-TOF MS光谱使用MBT Bruker库和MSI数据库进行了分析.
主要成果:
- 与非选择性SDA相比,选择性介质 (IDFP和SGC2) 显著改善了真菌识别.
- 乙醇 - 甲酸提取程序在选择性介质上的直接转移上没有显著的优势.
- 布鲁克图书馆的MBT图书馆在识别Aspergillus方面表现出色,而MSI数据库在皮肤植物方面表现优越;两者在其他真菌方面表现相对较好.
结论:
- 选择性培养基对于可靠的真菌鉴定与MALDI-TOF MS.不可或缺.
- 在使用选择性介质时,酸-乙醇蛋白质提取技术不会提供额外的好处.
- 建议使用MBT Bruker库和MSI数据库来进行全面和最佳的真菌识别.
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