克隆复合物 黄金葡萄球菌的分布 从加勒比群岛的临床样本中分离出来的隔离物
Stefan Monecke1,2,3, Patrick Eberechi Akpaka4, Margaret R Smith4
1Leibniz Institute of Photonic Technology (IPHT), 07745 Jena, Germany.
Antibiotics (Basel, Switzerland)
|June 28, 2023
概括
这项研究描述了来自特立尼达和多巴哥和牙买加的金黄色葡萄球菌,在对甲素敏感的菌株中发现了高比例的Panton-Valentine leukocidin (PVL). 还发现了新的MRSA菌株,这表明了新的流行病学联系.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 基因组学就是基因组学.
背景情况:
- 金黄色葡萄球菌 (Staphylococcus aureus) 是一个重要的人类病原体.
- 了解加勒比海的金黄色菌的遗传多样性和毒性因素对于公共卫生至关重要.
研究的目的:
- 从特立尼达和多巴哥和牙买加分离的黄金葡萄球菌和白银葡萄球菌进行全面的特征化.
- 确定潘顿-瓦伦丁白血素 (PVL) 的患病率,并确定克隆复合体 (CC) 和菌株.
主要方法:
- 用于基因检测和CC分配的DNA微阵列分析.
- 在体外PVL生产的实验侧流量测定.
- 基因组测序用于对特定分离物的详细遗传分析.
主要成果:
- 101 黄金/黄金 (S. aureus/S. 分析了阿根廷的分离物;两个是S. argenteus (CC2596).
- 在S. aureus分离物中发现了21个CC,PVL率高 (38/101),主要在MSSA菌株中.
- 发现了10个MRSA分离物,包括常见的ST239-MRSA-III和具有独特SCCmec元素的新型菌株,以及CC22,CC72和CC88.
结论:
- 该研究强调了在加勒比地区产生PVL的MSSA的高患病率,由当地CC8和CC152克隆驱动.
- 确定了具有明显SCCmec元素的新型MRSA菌株,表明抗性机制的演变以及可能与非洲和中东的新流行病学联系.
- 尽管在一个分离物中存在一个ACME元素,但USA300克隆的缺失表明,流通中的S. aureus种群的变化.
相关概念视频
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