对于对抗Enterobacter hormaechei的 cefiderocol的基因型-表型异常
Vineet Dubey1, Alessandro Gerada2, Charlotte M Jones1
1Department of Pharmacology and Therapeutics, University of Liverpool, United Kingdom.
概括
这项研究揭示了对Cefiderocol敏感的Enterobacter hormaechei的基因组-表型异常. 仅依靠MIC值可能会高估对抗耐药性病原体的 cefiderocol活性.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 肠杆菌cloacae复合体 (ECC) 导致严重的医疗相关感染,由于抗菌素耐药性,治疗选择有限.
- 塞菲德罗科尔是对抗卡巴因耐药病原体的关键治疗方法,但治疗失败发生,特别是在边界最小抑制度 (MIC) 时.
研究的目的:
- 为了表征CEfiderocol敏感的Enterobacter hormaechei分离的基因组耐药性景观.
- 为了调查潜在的基因组-表型异常影响塞菲德罗科尔活性.
主要方法:
- 临床Enterobacter hormaechei亚种的基因组和表型表征. 霍夫曼尼的隔离.
- 全基因组测序以确定耐药性决定因素和突变.
主要成果:
- 隔离物对多种抗生素表现出广泛的耐药性,但仍然对塞菲德罗科尔 (MIC=2 mg/L) 敏感.
- 基因组分析揭示了blaNDM-1,铁吸收途径的突变,以及全球调节器和β-乳酸目标 (ftsI) 的变化.
结论:
- 在这种E. hormaechei隔离物中观察到基因组-表型异常,具有边界二醇敏感性.
- 单独的MIC值可能会高估 cefiderocol 的疗效;基因组评估对于高风险的肠道细菌至关重要.
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