Genetic Characterization of MDR Genomic Elements Carrying Two - Genes in Feline-derived Clinical Isolate

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2023 Aug 14

PMID 37577435

Authors

Xue-Song Li

Yu Qi

Peng-Hui Li

Jun-Ze Xue

Xuan-Yu Li

Inam Muhammad

Ya-Zhuo Li

Dao-Mi Zhu

Ying Ma

Ling-Cong Kong

Hong-Xia Ma

Affiliations

Soon will be listed here.

Abstract

Multidrug-resistant () often cause intestinal infections in cats. The aim of this study was to investigate a multidrug-resistant isolate for plasmidic and chromosomal antimicrobial resistance and their genetic environment. strain ESC1 was obtained from the feces of a cat. Antimicrobial susceptibility testing was carried out using the broth microdilution method. Conjugation experiments were performed using and as receptors. Complete sequences of chromosomal DNA and plasmids were generated by whole genome sequencing (WGS) and bioinformatics analysis for the presence of drug resistance genes and mobile elements. Multidrug-resistant ESC1 contained a chromosome and three plasmids. The amino acid at position 80 of the gene on the chromosome was mutated from serine to isoleucine, and hence the amino acid mutation at this site led to the resistance of ESC1 strain to fluoroquinolones. Eleven antibiotic resistance genes were located on two plasmids. We identified a novel composite transposon carrying two aminoglycoside resistance genes -. This study reported the coexistence of a novel 5.4 kb composite transposon and a resistance plasmid with multiple homologous recombination in an isolate of ESC1. This data provides a basis for understanding the genomic signature and antimicrobial resistance mechanisms of this pathogen.

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