[对三种不同的方法进行比较,以调查耐卡巴胺抗性巴曼尼菌的临床分离物分子流行病学]
Gülşen Uluçam Atay1, Gülçin Bayramoğlu2, İlknur Tosun2
1Recep Tayyip Erdoğan University, Vocational School of Health Services, Department of Medical Services and Techniques, Rize, Türkiye.
Mikrobiyoloji bulteni
|April 27, 2024
概括
像PFGE和MLST这样的分子类型化方法对于追踪耐卡巴胺耐药的Acinetobacter baumannii是有效的. MALDI-TOF MS需要进一步开发,以便对这些高风险克隆进行可靠的流行病学分析.
科学领域:
- 临床微生物学 临床微生物学
- 分子流行病学分子流行病学
- 传染性疾病 传染性疾病
背景情况:
- 耐卡巴胺的巴曼尼菌 (Acinetobacter baumannii,简称CRAB) 构成了全球严重的健康威胁.
- 国际高风险克隆 (IC I,II和III) 经常与CRAB爆发有关.
- 准确的分子排型方法对于理解CRAB传输动态至关重要.
研究的目的:
- 评估携带碳烯酶基因的CRAB分离物与国际高风险克隆物之间的关系.
- 为了比较不同分子流行病学方法的一致性和区分能力.
- 评估脉冲场凝电泳 (PFGE),多位数序列类型 (MLST) 和矩阵辅助激光吸附/电离飞行时间质谱法 (MALDI-TOF MS) 对于CRAB类型的实用性.
主要方法:
- 使用聚合酶链反应 (PCR) 和DNA测序检测OXA型的碳酶基因 (blaOXA-23,blaOXA-24,blaOXA-51,blaOXA-58).
- 使用PFGE,MLST (帕斯特尔方案) 和MALDI-TOF MS (主要成分分析) 的72个CRAB分离物和参考菌株的分子类型化.
- 使用辛普森多样性指数 (SID) 进行歧视和华莱士系数进行一致的方法的统计比较.
主要成果:
- 所有CRAB分离物都含有blaOXA-23和blaOXA-51基因.
- PFGE确定了五种主要的脉冲型和18种亚型,与国际高风险克隆相关.
- MLST发现了五种序列类型 (ST1,ST2,ST81,ST157,ST604).
- 马尔迪-托夫MS PCA分析显示,与PFGE和MLST相比,他们的歧视能力较低.
- 在 MALDI-TOF MS 和 PFGE/MLST 数据 (华莱士系数) 之间没有发现显著一致.
- PFGE表现出显著的区分能力 (SID),PFGE/MLST一致性显著 (华莱士系数).
结论:
- PFGE和MLST是Acinetobacter baumannii流行病学分析的可靠方法,特别是对于高风险的克隆.
- 目前的PCA申请中,MALDI-TOF MS并不是CRAB流行病学类型的黄金标准,需要改进方法.
- 了解CRAB的分子流行病学对于有效的感染控制策略至关重要.
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