在台湾进行了一项比较表型和基因组分析,对抗甲素的黄金葡萄球菌ST45从台湾的细胞炎和骨质炎中分离出来
Kuo-Ti Peng1,2, Pei-Chun Chen1, Jiun-Liang Chen1
1Department of Orthopedic Surgery, Chang Gung Memorial Hospital, Chiayi.
The Journal of infectious diseases
|February 26, 2024
概括
甲素耐药金黄色葡萄球菌 (MRSA) ST45骨髓炎的分离物比细胞炎的更具有病原性和耐药性. 这些发现凸显了多抗药MRSA ST45菌株对公共卫生构成的威胁.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 传染性疾病 传染性疾病
背景情况:
- 甲素耐药黄金葡萄球菌 (MRSA) 序列类型 (ST) 45是一种全球流行的血统.
- 细胞炎与骨质炎的MRSA ST45分离物的独特特征尚未被探索.
研究的目的:
- 调查MRSAST45细胞炎和骨质炎分离物之间的表型和基因组差异.
- 评估抗微生物敏感性,生物膜形成,细胞感染性和体内致病性.
主要方法:
- 从台湾收集了15个MRSA ST45分离物 (6个细胞炎,9个骨髓炎).
- 针对抗微生物耐药性,生物膜形成和传染性的特征化分离物.
- 在选定的分离物上进行全基因组测序 (WGS).
主要成果:
- 骨髓炎MRSA ST45隔离物表现出对西普罗夫洛克萨,莱沃弗洛克萨,珍塔米辛和多克西环素的耐药性,与细胞炎隔离物不同.
- 骨髓炎分离体显示在小鼠中增强了生物膜形成,细胞感染力和更强的毒性.
- 在骨髓灰质炎分离物中,WGS确定了毒性/耐药性基因和独特的可移植元素 (IS256,IS257R2) 的突变.
结论:
- 来自骨髓炎的MRSA ST45分离物具有高度致病性和多药性耐药性.
- 这些发现表明,与这些特定的MRSA菌株相关的公共卫生风险很大.
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