复发性Achromobacter血流感染患者中的基因组异质性和血统特异性β-乳糖酶
Hsien-Po Huang1, Yao-Ting Huang2, Ting-Kuang Yeh1
1Division of Infectious Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.
Emerging microbes & infections
|August 26, 2025
概括
由于抗菌药物耐药性,反复出现的阿克罗姆巴克特菌感染具有挑战性. 全基因组测序揭示了基因变化和新物种,改善了对患者更好的诊断和抗药性检测.
科学领域:
- 微生物学
- 基因组学
- 传染性疾病
背景情况:
- 由于患者的抗菌药物耐药性和进化,复发性阿克罗巴克特感染会带来临床挑战.
- 准确识别和理解耐药机制对于有效治疗至关重要.
研究的目的:
- 通过全基因组测序来研究从复发感染中分离的Achromobacter的遗传和表型变化.
- 改进物种识别和检测抗菌药物耐药性的模式.
主要方法:
- 对65例Achromobacter感染病例 (2016-2023) 的回顾性分析.
- 12个来自复发性血液感染的单元的全基因组测序 (牛津纳米孔).
- 使用平均核酸标识 (ANI) 来识别抗性基因,β-乳糖酶和遗传学分析.
主要成果:
- 复发性感染与血液和尿路感染有关 (p<0. 01).
- 全基因组测序发现了一种新的Achromobacter物种和A. insuavis的第一个细菌病例,其表现优于MALDI-TOFMS.
- 贝塔- 乳糖酶分布与基因组相关,表现出基因特异性耐药性. 特定基因 (siaT,rapA,atzEa1,AL523_09115,clpA) 的误解突变与抗菌性变化有关.
结论:
- 全基因组测序可以提高阿克罗巴克特物种的识别和抗菌素耐药性的检测.
- 遗传异质性和体内进化导致感染复发.
- 需要进一步的大规模研究来监测变体及其临床影响.
相关概念视频
Development of Antibiotic Resistance
197
Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
197
Genomic DNA in Prokaryotes
44.6K
The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genomic Diversity in Bacteria
Although bacterial genomes are much...
44.6K


