追踪CTX-M通过可转移元素的传播在尿病原体和开始性E. 大肠杆菌
Denyss Guilcazo1, Liseth Salinas1, Cristina Chavez1
1Universidad San Francisco de Quito, Colegio de Ciencias Biológicas Ambientales, Instituto de Microbiología, Quito, Ecuador.
Future microbiology
|January 29, 2025
概括
大肠杆菌中的blaCTX-M基因旁边的序列可以作为跟踪抗菌素耐药性基因传播的标记. 这项研究分析了这些序列在厄瓜多尔的孤立,揭示了独特的遗传环境.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 流行病学 流行病学
背景情况:
- 抗菌素耐药性 (AMR) 构成了全球健康威胁.
- 携带β-乳糖酶基因的可转移元素,如blaCTX-M,是AMR传播的关键驱动因素.
- 了解这些基因的遗传背景对于追踪传播途径至关重要.
研究的目的:
- 研究与携带blaCTX-M等位基变异的可转移元素相关的核酸序列.
- 探索它们作为抗微生物耐药性基因传播标记物的潜力,在家禽,人类和环境中进行传播.
- 分析厄瓜多尔大肠杆菌分离物中的blaCTX-M变异的遗传环境.
主要方法:
- 全基因组测序是在来自厄瓜多尔基多的开始性和泌尿病原性大肠杆菌分离物上进行的.
- 分析了大量blaCTX-M等位基变异 (blaCTX-M-27,blaCTX-M-55和blaCTX-M-65) 的核酸序列.
- 遗传学分析被用来确定blaCTX-M基因的遗传环境.
主要成果:
- 来自厄瓜多尔的commensal和uropathogenic大肠杆菌在blaCTX-M基因周围表现出完全相同的核酸序列.
- 这些序列的合成与全球发现的类似.
- 遗传学分析揭示了厄瓜多尔分离品中blaCTX-M基因的独特遗传环境.
结论:
- 围绕blaCTX-M基因的核酸序列可以成为解决抗微生物耐药性基因 (ARG) 传播途径的有价值标记.
- 这些标记物对于ARG传播的区域间分析特别有用.
- 这些发现突出了利用遗传标记来理解抗菌素耐药性传播的复杂动态的潜力.
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