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导致复发感染的 Pseudomonas aeruginosa 隔离物的分子流行病学和基因组动力学

Cong Shen^1,2, Jinxiang Zeng^1,2, Dexiang Zheng^1,2

¹The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.

Microbiology spectrum

|September 28, 2023

概括

复发性 Pseudomonas aeruginosa 感染很常见,特别是耐卡巴胺菌株. 全基因组测序揭示了快速的基因组进化,并确定了fptA基因中的潜在诊断和治疗标.

科学领域:

传染性疾病传染性疾病
基因组学就是基因组学.
微生物学微生物学

背景情况:

Pseudomonas aeruginosa (P. aeruginosa) 是慢性感染的主要原因,特别是在囊性纤维化患者中.
复发的P. aeruginosa感染由于抗菌素耐药性增加和治疗挑战而具有临床意义.
了解中国的复发模式至关重要,因为数据仍然有限.

研究的目的:

调查中国复发P. aeruginosa感染的发生率和基因组特征.
确定潜在的目标,以改善复发性P. aeruginosa感染的诊断和治疗.
评估全基因组测序在理解复发性感染的演变中的作用.

主要方法:

一项为期3年的回顾性研究 (2019-2022年) 分析了196名患者的442个P. aeruginosa分离物.
临床记录查和全基因组测序 (WGS) 用于识别复发感染.
遗传学分析和比较基因组学被用来研究孤立进化.

主要成果:

观察到复发发病率为31.6%,在耐卡巴胺的P. aeruginosa感染中 (51.4%) 与易感感染者 (20.2%) 相比,复发发病率显著更高.
复发隔离物表现出多样化的序列类型,表明没有特定的血统导致复发性感染.
基因组分析显示了快速适应,包括抗微生物耐药性变化,基因流动和fptA病毒性基因的融合突变.

结论:

复发性P. aeruginosa感染是频繁的,并由快速的基因组进化而不是特定的血统驱动.
在fptA基因的融合突变为诊断和治疗复发性感染提供了一个有希望的目标.
综合使用WGS和临床数据可以改善复发P. aeruginosa感染的诊断,需要持续的基因组监测.

关键词:

伪omonas aeruginosa 这种类型的病毒.分子流行病学分子流行病学患病率的流行情况.感染复发的感染复发.进行全基因组测序.

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