Molecular epidemiological characteristics of carbapenem-resistant Pseudomonas aeruginosa clinical isolates in southeast Shanxi, China

被引:3
|
作者
Bai, Yang [1 ,2 ]
Gong, Yan-e [1 ,2 ]
Shen, Fangfang [1 ,2 ]
Li, Hui [1 ,2 ]
Cheng, Yan [1 ,2 ]
Guo, Jinying [1 ,2 ]
Liu, Guangming [1 ,2 ]
Ji, Ai -fang [1 ,2 ,3 ]
机构
[1] Heping Hosp, Changzhi Med Coll, Changzhi, Shanxi, Peoples R China
[2] Changzhi Med Coll, Dept Med Lab, Changzhi, Shanxi, Peoples R China
[3] Heping Hosp, Changzhi Med Coll, Dept Med Lab, 110 Yanan South Rd, Changzhi, Shanxi, Peoples R China
关键词
Pseudomonas aeruginosa; Carbapenem resistance; 16s rRNA methylase; Molecular epidemiologicy; Multilocus sequence typing; Next -generation sequencing;
D O I
10.1016/j.jgar.2023.12.029
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Objectives: Infection by carbapenem-resistant Pseudomonas aeruginosa (CRPA) is a serious clinical problem worldwide. However, the molecular epidemiology of the clinical isolates varies depending on the region. This study was conducted to analyse the resistance phenotype and clarify the genetic and epidemiological properties of CRPA clinical isolates from southeast Shanxi, China. Methods: Fifty-seven isolates of CRPA were collected from a hospital in this region. These isolates were reidentified by MALDI-TOF and subjected to whole-genome sequencing by next-generation sequencing. Phylogenetic trees were constructed based on single nucleotide polymorphisms (SNPs), after which multilocus sequence typing (MLST) was performed and antimicrobial resistance genes were identified. Results: All the 57 CRPA isolates carried at least one kind of gene encoding carbapenemase, such as blaIMP-1, blaIMP-10, blaOXA-10, blaOXA-395, blaOXA-396, blaOXA-485, blaOXA-486, blaOXA-488, blaOXA-494, and blaOXA-50. The isolates harboured AIM-1, CMY-51, mecD, and NmcR genes and carried one kind of Pseudomonas -derived cephalosporinase (PDC) beta-lactamase-encoding gene, such as blaPCD-1 to blaPCD-3, blaPCD-5, or blaPCD-7 to blaPCD-10. Two isolates were found to harbour the aminoglycoside-modifying enzyme genes aadA1 and aadA7; however, no isolates were found to harbour genes encoding 16S rRNA methylase or quinolone resistance-related genes. These CRPA isolates belonged to various sequence types (STs), two of which, namely, ST235 and ST277, were high-risk types. Conclusions: Our findings indicate that CRPA isolates carrying resistance genes with unique regional characteristics are spreading in this region, with a high diversity of STs, especially in high-risk clones. These findings highlight the necessity for further measures to prevent CRPA spread in Shanxi. (c) 2024 The Author(s). Published by Elsevier Ltd on behalf of International Society for Antimicrobial Chemotherapy. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )
引用
收藏
页码:301 / 306
页数:6
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