解码Proteus mirabilis生物膜:选择的毒性基因的表达和与抗生素耐药性的关联
Malshani Chathuranika Nissanka1, Ayomi Dilhari2, Jagath Anuradha Munasinghe3
1Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.
BMC microbiology
|August 6, 2025
概括
蛋白质奇迹菌在尿液和非尿液分离物中都含有关键的毒性基因 (ureC,mrpA,speA,rsbA),其不同表达与多药性耐药性 (MDR) 和广泛耐药性 (XDR) 菌株有关,表明毒性增加.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 遗传学 是一个遗传学.
背景情况:
- 奇迹性蛋白质是一种重要的尿病原体,以在尿导管上形成弹性晶体生物膜而闻名.
- 生物膜由P. mirabilis形成,有助于持续感染和抗生素耐药性,特别是在复杂的尿路感染.
- 了解P. mirabilis的毒性基因和抵抗机制对于开发有效的治疗策略至关重要.
研究的目的:
- 调查从尿液和非尿液来源的分离物中关键的P.奇迹性毒性基因 (ureC,mrpA,speA,rsbA) 的流行和表达.
- 分析这些毒性基因的存在和表达与抗菌素耐药性概况之间的关联.
- 确定多药耐药性 (MDR) 和广泛耐药性 (XDR) 状态对基因表达的影响.
主要方法:
- 常规和定量实时PCR (qPCR) 用于检测毒性基因的存在和表达.
- 抗生素敏感性测试 (AST) 根据CLSI指南使用Kirby-Bauer方法进行.
- 使用R语言进行统计分析,以评估基因流行,表达和关联.
主要成果:
- 病毒性基因在尿液和非尿液分离物中都显示出高患病率 (>84%),没有显著差异.
- 100%的尿液分离物和96.15%的非尿液分离物表现出多药性耐药性 (MDR).
- 广泛耐药 (XDR) 菌株是普遍存在的 (57.69%在尿中, 65.38%在非尿中). 基因组合与更高的抗药率相关.
- 表达水平各不相同:尿液分离物中mrpA最高,非尿液分离物中speA最高.
- XDR状态没有显著影响基因表达.
结论:
- 病毒性基因ureC,mrpA,speA和rsbA在P. mirabilis中无处不在,但它们的表达模式在尿和非尿分离物之间有所不同.
- 基因表达的显著变异表明受宿主或环境因素的影响.
- 很高的MDR和XDR菌株的流行率,可能是由这些毒性基因组合驱动的,表明P. mirabilis的毒性潜力较高.
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