长读测序对检测抗菌素耐药性的贡献
Roberto Sierra1,2,3, Mélanie Roch2, Milo Moraz4
1Infectious Diseases Division, Department of Medicine, Geneva University Hospitals and Faculty of Medicine, 1205 Geneva, Switzerland.
Pathogens (Basel, Switzerland)
|September 28, 2024
概括
长读数测序准确地识别了细菌中的多个碳烯酶等位基,超过了用于抗菌素耐药性监测的短读数测序. 这一发现对于追踪耐药病原体至关重要.
科学领域:
- 基因组学就是基因组学.
- 微生物学 微生物学
- 传染性疾病 传染性疾病
背景情况:
- 抗微生物耐药性 (AMR) 需要先进的监测方法,如全基因组测序 (WGS).
- 短读序列 (Illumina) 为SNP提供了高精度,但受读长度的限制.
- 长读测序 (例如,牛津纳米孔) 在组装复杂基因组方面表现出色,但历史上其准确性较低.
研究的目的:
- 为了比较短读和长读测序,以识别 *K. pneumoniae* 中的碳烯酶耐药基因.
- 评估每个技术在检测基因重复和多个等位基因方面的准确性.
- 评估WGS在抗菌素耐药性监测中的有用性.
主要方法:
- 对比Illumina测序平台 (ISP) 和牛津纳米孔技术 (ONT) 的对比测序 *K. pneumoniae* VS17.
- 专注于识别 *bla*NDM 耐药基因的等位基因.
- 使用结合试验和桑格测序作为黄金标准的验证.
主要成果:
- 观察到的差异:ISP确定了*bla*NDM-4,而ONT确定了*bla*NDM-1和*bla*NDM-5.
- 结合测定和桑格测序证实了ONT对多个等位基因的识别.
- 在基因重复或多个等位基因的情况下突出显示的短读测序限制.
结论:
- 与短读测序相比,长读测序技术在精确的碳烯酶等位基鉴定方面表现出优异的性能.
- 准确识别多重碳烯酶对于流行病监测和感染控制至关重要.
- 建议混合或长读组件用于全面的抗菌耐药性监测.
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