尿病原菌大肠杆菌的生物膜形成和抗生素耐药性:一个分子表征和抗生素学研究
Saman1, Abu Baker Siddique1, Bilal Aslam1
1Institute of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan.
概括
这项研究发现,大多数尿病原性大肠杆菌 (大肠杆菌) 菌株形成生物膜,有助于尿路感染中抗生素耐药性. 识别这些生物膜形成的大肠杆菌对于有效的治疗策略至关重要.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 分子生物学分子生物学
背景情况:
- 生物膜形成是尿路感染 (UTI) 的关键毒性因素.
- 大肠杆菌 (E. coli) 是尿路感染的主要致病原体,对抗微生物药物的耐药性增加.
- 了解生产生物膜的大肠杆菌的特征对于管理尿路感染至关重要.
研究的目的:
- 根据生物膜形成能力从尿样中分离和描述大肠杆菌.
- 确定尿病原性大肠杆菌 (UPEC) 中生物膜形成的流行率.
- 评估抗微生物敏感性和生物膜形成与抗生素耐药性之间的关联.
主要方法:
- 收集了804个人类尿液样本用于大肠杆菌分离.
- 使用微板测定 (MPA) 和刚果红法来评估生物膜形成.
- 通过聚合酶链反应 (PCR) 进行了抗微生物敏感性测试和生物膜形成基因的分子特征.
主要成果:
- 生物膜生产率为88%的MPA和68%的刚果红.
- 在UPEC分离物中,对阿莫西西林-克拉夫兰酸盐 (97%),塞福帕拉 (93%),塞福塔西姆 (91%) 和安培 (90%) 呈现出高耐药性.
- 对几种抗生素,包括piperacillin-tazobactam和meropenem,观察到抗生素耐药性和生物膜形成之间的显著关联.
- 生物膜形成基因 (fimH,csgA,bcsA,agn43,papC,focG) 的患病率在33%至89%之间.
结论:
- 高比例的UPEC分离物能够形成生物膜,与抗生素耐药性增加相关.
- 该研究确定了在UPEC菌株中普遍存在的特定生物膜形成基因.
- 研究结果强调了在UPEC感染中考虑生物膜形成的重要性,以制定有效的治疗策略.
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