塞法索林注射剂在对甲基西林敏感的金黄色葡萄球菌临床分离物中的作用
Shuma Tsuji1, Kazuyoshi Gotoh2, Tadahiro Manabe3
1Department of Bacteriology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; Department of Medical Laboratory Science, Okayama University Graduate School of Health Sciences, Okayama, Japan.
Diagnostic microbiology and infectious disease
|June 14, 2024
概括
塞法林注射效应 (CInE) 在日本黄金葡萄球菌 (MSSA) 隔离物中进行了研究. 尽管blaZ基因的患病率很高,但没有任何隔离物符合CInE标准,这表明在这种临床环境中患病率非常低.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 临床药房 临床药房
背景情况:
- 塞法佐林注射效应 (CInE) 是一种现象,当细菌度较高时,细菌对塞法佐林的敏感性会降低.
- 对甲素敏感的金黄色葡萄球菌 (MSSA) 是细菌感染的常见原因.
- 了解CInE患病率对于指导适当的抗生素治疗至关重要.
研究的目的:
- 为了确定Cefazolin注射剂效应 (CInE) 的流行率和特征,在日本的临床甲素敏感黄金葡萄球菌 (MSSA) 隔离物中.
- 评估blaZ基因存在与CInE发生之间的相关性.
主要方法:
- 从日本环境中收集和识别临床MSSA分离物.
- 使用标准微生物学方法对Cefazolin注射剂效应 (CInE) 进行表型测试.
- 在收集的分离物中检测blaZ基因的分子检测.
主要成果:
- 在临床MSSA分离物中,总共有35.5% (39分110) 携带了blaZ基因.
- 没有一个测试的MSSA分离物表现出Cefazolin注射剂效应 (CInE) 的表型标准.
- 在这个队列中,blaZ基因的存在与CInE的发生没有相关性.
结论:
- 在日本的临床MSSA隔离物中,Cefazolin注射效应 (CInE) 的流行率似乎非常低.
- 虽然 blaZ 基因存在于显著比例的分离物中,但在本研究中与 CInE 无关.
- 可能需要进一步的研究来阐明CInE在MSSA中的机制和临床影响.
相关概念视频
Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...


