克里斯普尔系统和MepA多药物排泄与黄金菌的抗生素耐药性有关
Jingge Wang1, Panpan Liu1, Na Li1
1College of Animal Science and Technology, Ningxia University, Yinchuan, China.
Foodborne pathogens and disease
|February 20, 2025
概括
在金黄色葡萄球菌中,CRISPR位点删除或减少的转录水平可能会调节抗生素耐药性. 这项研究将CRISPR和MepA排泄活动与牛乳腺炎分离体中西普洛素耐药性联系起来.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 黄金葡萄球菌 (S. aureus) 是一种重要的动物性病原体,引起牛乳腺炎.
- 在S. aureus抗生素耐药性方面,CRISPR系统和排泄的作用仍然不完全理解.
研究的目的:
- 来调查受乳腺炎影响的母牛中S. aureus中CRISPR携带的情况.
- 确定CRISPR和排泄在抗生素耐药性机制中的参与.
主要方法:
- 对234个金黄色菌分离物中抗生素耐药性基因和CRISPR位点的分析.
- 测序CRISPR间隔器和评估CRISPR存在与抗生素耐药性的相关性.
- 在抗生素压力下对CRISPR序列变化的评估和MepA排泄活动.
主要成果:
- 在7.69%的S. aureus分离物中检测到CRISPR位点.
- 克里斯普尔阳性分离体显示,特定抗生素耐药基因 (gyrA,grlA,norA,tet(M)) 的流行率较低.
- 抗 Ciprofloxacin 耐药性与 CRISPR 位点变化 (重复/间隔损失,转录水平降低) 和 MepA 排泄活动相关.
结论:
- 克里斯普尔系统的改变和MepA流量活动与S. aureus抗生素耐药性有关.
- 对CRISPR位点或MepA表达的下调可能代表了适应性抵抗机制.
- 这些发现为监测病原性细菌中黄金菌的流行率和耐药性提供了基础.
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