在抗菌素敏感性测试期间,Bacillus cereus的滑动性介导了万科米辛伪耐药性
Paul J Schmid1, Patrick Forstner1, Clemens Kittinger1
1Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, Austria.
The Journal of antimicrobial chemotherapy
|May 24, 2024
概括
通过使用微稀释,在Bacillus cereus中反驳了万科米辛耐药性的证据,揭示了滑动性和生物膜形成是导致不准确的扩散测试的原因. 可靠的万科米辛敏感性测试需要参考方法.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 范科米辛是治疗严重的细菌菌类感染的主要治疗方法.
- 报告了零星的万科米辛耐药性,主要通过阿加扩散方法检测到.
- 阿格拉扩散试验可能会产生不准确的Bacillus cereus易感性的结果.
研究的目的:
- 为了调查一种Bacillus cereus分离物中预先假设的高万科米辛耐药性的原因.
- 评估不同抗菌素敏感性测试方法对Bacillus cereus的准确性.
- 确定Bacillus cereus中伪耐药性的潜在机制.
主要方法:
- 苏微稀释和阿加稀释用于万科米辛敏感性测试.
- 在测试期间观察细菌运动性的显微镜成像.
- 在纳米孔平台上的RNA-Seq用于转录组分析.
- 分析与生物膜形成,毒性和运动性相关的基因表达.
主要成果:
- 范科米辛耐药性的证据被驳斥;该分离物表现出伪耐药性.
- 滑动性,而不是真正的阻力,被确定为不准确的亚格扩散测试的原因.
- 在伪耐药细胞中观察到生物膜形成基因的上调和毒性和鞭毛基因的下调.
- 在这个群体中,阿加尔扩散测试被认为不足以准确确定万科米辛敏感性.
结论:
- 甲扩散测试不足以对Bacillus cereus进行可靠的万科米辛敏感性测试.
- 苏微稀和阿加稀是推的准确测试的参考方法.
- 滑动性和生物膜形成可能会干扰抗微生物敏感性测试,影响治疗疗效.
- 这项研究强调了需要更新的指导方针,考虑在抗菌素敏感性测试中干扰表型.
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