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Deciphering the resistome of the widespread extensively drug resistant (XDR) P. aeruginosa ST175 clone.

ABSTRACT: Whole genome sequencing (WGS) was used for the characterization of the phylogeny, the molecular epidemiology and the resistome of the multidrug resistant (MDR)/ extensively drug resistant (XDR) P. aeruginosa high-risk clone ST175.

PROVIDER: PRJEB15036 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR1663010_1.fastq.gz	Fastqsanger.gz
	ERR1663010_2.fastq.gz	Fastqsanger.gz
	ERR1664530_1.fastq.gz	Fastqsanger.gz
	ERR1664530_2.fastq.gz	Fastqsanger.gz
	ERR1664560_1.fastq.gz	Fastqsanger.gz

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Project description:Whole-genome sequencing (WGS) was used for the characterization of the frequently extensively drug resistant (XDR) Pseudomonas aeruginosa sequence type 175 (ST175) high-risk clone. A total of 18 ST175 isolates recovered from 8 different Spanish hospitals were analyzed; 4 isolates from 4 different French hospitals were included for comparison. The typical resistance profile of ST175 included penicillins, cephalosporins, monobactams, carbapenems, aminoglycosides, and fluoroquinolones. In the phylogenetic analysis, the four French isolates clustered together with two isolates from one of the Spanish regions. Sequence variation was analyzed for 146 chromosomal genes related to antimicrobial resistance, and horizontally acquired genes were explored using online databases. The resistome of ST175 was determined mainly by mutational events; resistance traits common to all or nearly all of the strains included specific ampR mutations leading to ampC overexpression, specific mutations in oprD conferring carbapenem resistance, or a mexZ mutation leading to MexXY overexpression. All isolates additionally harbored an aadB gene conferring gentamicin and tobramycin resistance. Several other resistance traits were specific to certain geographic areas, such as a streptomycin resistance gene, aadA13, detected in all four isolates from France and in the two isolates from the Cantabria region and a glpT mutation conferring fosfomycin resistance, detected in all but these six isolates. Finally, several unique resistance mutations were detected in single isolates; particularly interesting were those in genes encoding penicillin-binding proteins (PBP1A, PBP3, and PBP4). Thus, these results provide information valuable for understanding the genetic basis of resistance and the dynamics of the dissemination and evolution of high-risk clones.

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