[菌素敏感肠球菌分离物中的vanA/vanB基因:分子识别和诊断方法的评估]
Merve Gürler1, Zeynep Ceren Karahan2, Ebru Evren2
1Ankara Bilkent Şehir Hastanesi, Tıbbi Mikrobiyoloji Kliniği, Ankara.
Mikrobiyoloji bulteni
|October 30, 2025
概括
菌素变异性肠球菌 (VVE) 很难检测. 分子方法对于识别这些耐药菌株,防止治疗失败和指导抗菌战略至关重要.
科学领域:
- 临床微生物学 临床微生物学
- 分子诊断学 分子诊断
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 范科米辛变异性肠球菌 (VVE) 带来了诊断和治疗方面的挑战.
- 这些菌株表现出表型的万科米辛敏感性,但具有抗药性基因.
- 传统方法往往无法检测到VVE,从而有可能导致治疗失败.
研究的目的:
- 为了研究范A和范B耐药基因在表型敏感的Enterococcus分离体中的患病率.
- 评估多重和单重PCR在VVE检测中的实用性.
主要方法:
- 对251个临床Enterococcus分离物的回顾性分析.
- 表型敏感性测试 (光盘扩散,汁微稀释,Etest®).
- 多重和单重PCR针对vanA和vanB基因.
主要成果:
- 检测到一个 vanA 阳性 E. faecalis 隔离物 (0.4%),表型敏感于 vancomycin.
- 多重PCR检测到100个vanB阳性分离物 (39.8%),但没有一个被单重PCR证实.
- 在多重PCR中,虚假阳性vanB结果的高率.
结论:
- 仅仅依靠传统的测试,就有可能错过VVE.
- 确认性测试对于分子VVE检测工作流程至关重要.
- 整合基因特异性PCR有助于VVE识别和抗菌药物管理.
更多相关视频
相关概念视频
Modern Molecular Taxonomy
536
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
536
Methods of Classification and Identification
913
Bacterial identification relies on a diverse array of techniques to classify and understand microorganisms, each tailored to uncover specific characteristics. Traditional morphological approaches, while still valuable, are limited for closely related or structurally simple organisms. Modern methods integrate biochemical, serological, genetic, and advanced molecular tools to achieve greater accuracy.Morphological and Biochemical TechniquesMorphological characteristics, such as cell shape and...
913
Applications of Molecular Taxonomy
467
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
467


