沙特阿拉伯MRSA的流行,抗菌耐药性和分子特征:一项回顾性研究
Soha Abdallah Moursi1, Mohd Saleem1, Azharuddin Sajid Syed Khaja1
1Department of Pathology, College of Medicine, University of Hail, Hail 55476, Saudi Arabia.
Microorganisms
|January 28, 2026
概括
沙特阿拉伯的甲素耐药黄金葡萄球菌 (MRSA) 越来越普遍,与医疗保健相关的菌株占主导地位. 该研究强调了新兴的万科米辛耐药性和MRSA克隆类型的转变,需要加强监测和管理.
科学领域:
- 临床微生物学和传染病.
- 抗微生物耐药性的分子流行病学.
背景情况:
- 甲素耐药黄金葡萄球菌 (MRSA) 在全球面临重大挑战,原因是抗菌素耐药性 (AMR) 和遗传多样性.
- 区分医疗保健相关的MRSA (HA-MRSA) 和社区相关的MRSA (CA-MRSA) 对于了解传播动态和指导治疗至关重要.
研究的目的:
- 调查沙特阿拉伯HA-MRSA和CA-MRSA分离物的流行率,抗微生物耐药性概况和分子特征.
- 确定该地区与MRSA菌株相关的关键毒性因素和遗传标记.
主要方法:
- 从临床样本中对178个MRSA分离物的回顾性分析.
- 通过Cefoxitin磁盘扩散进行MRSA识别.
- 使用BD尼克斯M50.0.使用抗微生物敏感性测试 (万科米辛,线索利德,西普罗夫洛克萨辛).
- 分子表征包括SCCmec类型,spa类型和PCR的毒性基因 (pvl,tst,eta,etb,lukS,lukF).
主要成果:
- 在S. aureus分离物中,MRSA占11.9%,HA-MRSA (61.8%) 的流行率高于CA-MRSA (38.2%).
- 7.8%的HA-MRSA分离体显示异性耐药的万科素中间体黄金色杆菌 (hVISA).
- 在HA-MRSA (85.0%) 与CA-MRSA (38.9%) 之间,对西普罗素的耐药性显著更高.
- 在SCCmec类型V中占主导地位 (87.1%),表明CA-MRSA透到医院.
- 斯帕类型检测显示出高遗传多样性 (t037最常见的27%);病毒性基因不常见 (6%).
结论:
- 该研究揭示了沙特阿拉伯MRSA患病率日益增加,新出现的hVISA菌株以及克隆分布的显著转变.
- 增加SCCmec类型V的患病率表明HA-MRSA和CA-MRSA之间的界限模糊了.
- 持续的分子监测和强有力的抗菌药物管理对于打击MRSA在医疗保健和社区环境中的传播至关重要.
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