菌体与mNGS相结合,提高了细菌感染诊断的特异性
Ying Liu1, Yafeng Zheng2, Lu Wang1
1Department of Critical Care Medicine, the Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, Shandong Province 266000, China.
The Journal of infection
|October 4, 2025
概括
在血液和BALF样本中与细菌病原体一起检测到的菌体可以帮助区分感染与殖民. 将菌体分析与元基因下一代测序 (mNGS) 结合起来,可以改善毒性病原体的鉴定.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 生物信息学是一种生物信息学.
背景情况:
- 甲基因组下一代测序 (mNGS) 对于病原体检测至关重要,但难以区分感染与殖民.
- 准确的区分对于有效的患者治疗和管理至关重要.
研究的目的:
- 为了研究人类血液和呼吸道中的菌体组成.
- 确定菌体检测和细菌感染之间的关联.
- 用mNGS数据评估菌体在分辨传染病原体方面的潜力.
主要方法:
- 从住院患者收集的临床样本 (血液和支气管支气管洗液 - BALF).
- 提取的DNA和无细胞DNA用于通过mNGS识别病原体.
- 在已识别的病原体上进行了菌体注释.
主要成果:
- 增加了与细菌感染相关的特定菌体的比例 (Acinetobacter baumannii,Klebsiella pneumoniae,Pseudomonas aeruginosa,S. aureus).这些菌体的多样性与细菌感染相关.
- 在Acinetobacter baumannii感染的BALF样本中发现了Autographiviridae,Sifhoviridae和Myoviridae的比例明显更高,而不是殖民.
- 在区分感染与殖民时,Myoviridae表现出86.36%的灵敏度和52.94%的特异性.
结论:
- 与mNGS结合的菌体分析与单独的mNGS相比,增强了毒症中的病原体识别和特异性.
- 这些发现为改善感染的临床诊断提供了新的工具.
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