Diversification and prevalence of the quinolone resistance crpP genes and the crpP-carrying Tn6786-related integrative and conjugative elements in Pseudomonas aeruginosa

Virulence

Hong Du¹  Hongyu Fu¹  Zhichen Zhu¹  Ying Jing²  Yuee Zhao²  Dongsheng Zhou²  Huiying Yang²  Zhe Yin² 

[1] Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Chin;State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, Chin;

关键词: Pseudomonas aeruginosa;    quinolone resistance;    crpP;    integrative and conjugative element;    typing/nomenclature scheme;    China;   

DOI  :  10.1080/21505594.2021.1962160

来源: Taylor & Francis

【 摘 要 】

The quinolone resistance crpP genes can mediate decreased susceptibility to quinolones. However, diversification and prevalence of crpP genes and crpP-carrying integrative and conjugative elements (ICEs) still need to be elucidated. In this study, genome sequencing was conducted for 200 Chinese Pseudomonas aeruginosa isolates, 16 of which were fully sequenced. All the 37 available CrpP variants were collected for phylogenetic analysis, 10 CrpP enzymes were chosen to conduct cloning and antimicrobial susceptibility test, and 22 crpP-carrying Tn6786-related ICEs were selected for detail genetic dissection analysis. Then, typing/nomenclature schemes for crpP variants and crpP-carrying ICEs were established for the first time. The 10 representative CrpP enzymes were confirmed to mediate decreased susceptibility to one to three quinolones. Tn6786-related ICEs displayed high-level diversification in both nucleotide sequences and modular structures. Mainly, massive gene acquisition/loss occurred across the whole genomes of Tn6786-related ICEs. 53.5% (107/200) of the tested clinical P. aeruginosa isolates from China carried crpP genes, which were exclusively located within chromosome-borne Tn6786-related ICEs. The crpP-carrying ICEs were at active stages of evolution and had the high potential to be an important vector for the dissemination of resistance genes besides crpP. The present study furthered the understanding of the bioinformatics and epidemiology of crpP genes and crpP-carrying ICEs.

【 授权许可】

CC BY