Multidrug Resistance Dissemination in Escherichia coli Isolated from Wild Animals: Bacterial Clones and Plasmid Complicity
Open Access
- 2 March 2021
- journal article
- research article
- Published by MDPI AG in Microbiology Research
- Vol. 12 (1), 123-137
- https://doi.org/10.3390/microbiolres12010009
Abstract
Objectives. Epidemiological data concerning third-generation cephalosporin (3GC) resistance in wild fauna are scarce. The aim of this study was to characterize the resistance genes, their genetic context, and clonal relatedness in 17 Escherichia coli resistant to 3GC isolated from wild animals. Methods. The isolates were characterized by short-read whole genome sequencing, and long-read sequencing was used for the hybrid assembly of plasmid sequences. Results. The 3GC resistance gene most identified in the isolates was the extended-spectrum β-lactamases (ESBL)-encoding gene blaCTX-M-1 (82.3%), followed by blaCTX-M-32 (5.9%), blaCTX-M-14 (5.9%), and blaSHV-12 (5.9%). E. coli isolates mainly belonged to the sequence types (STs) rarely reported from humans. The single nucleotide polymorphism (SNP)-based typing showed that most E. coli genomes from wild animals (wild boars, birds of prey, and buzzards) formed clonal clusters (blaCTX-M-1-harboring IncI1-ST3 plasmid was the predominant ESBL-encoding plasmid (76.4%) in wild animal isolates. Plasmid comparison revealed a 110-kb self-transferable plasmid consisting of a conserved backbone and two variable regions involved in antimicrobial resistance and in interaction with recipient cells during conjugation. Conclusion. Our results highlighted the unexpected clonal dissemination of blaCTX-M-1-encoding clones and the complicity of IncI1-ST3 plasmid in the spread of blaCTX-M-1 within wild fauna.Keywords
This publication has 80 references indexed in Scilit:
- Emergence and spread of B2-ST131-O25b, B2-ST131-O16 and D-ST405 clonal groups among extended-spectrum- -lactamase-producing Escherichia coli in JapanJournal of Antimicrobial Chemotherapy, 2012
- Identification of acquired antimicrobial resistance genesJournal of Antimicrobial Chemotherapy, 2012
- Wild Coastline Birds as Reservoirs of Broad-Spectrum-β-Lactamase-Producing Enterobacteriaceae in Miami Beach, FloridaAntimicrobial Agents and Chemotherapy, 2012
- Clinical and Molecular Characteristics of Extended-Spectrum- β-Lactamase-Producing Escherichia coli Causing Bacteremia in the Rotterdam Area, NetherlandsAntimicrobial Agents and Chemotherapy, 2011
- National survey of Escherichia coli causing extraintestinal infections reveals the spread of drug-resistant clonal groups O25b:H4-B2-ST131, O15:H1-D-ST393 and CGA-D-ST69 with high virulence gene content in SpainJournal of Antimicrobial Chemotherapy, 2011
- Antibiotic-Resistant Escherichia coli Bacteria, Including Strains with Genes Encoding the Extended-Spectrum Beta-Lactamase and QnrS, in Waterbirds on the Baltic Sea Coast of PolandApplied and Environmental Microbiology, 2010
- Genetic Detection of Extended-Spectrum β-Lactamase-Containing Escherichia coli Isolates from Birds of Prey from Serra da Estrela Natural Reserve in PortugalApplied and Environmental Microbiology, 2010
- Resistance Plasmid Families in EnterobacteriaceaeAntimicrobial Agents and Chemotherapy, 2009
- Seagulls of the Berlengas Natural Reserve of Portugal as Carriers of Fecal Escherichia coli Harboring CTX-M and TEM Extended-Spectrum Beta-LactamasesApplied and Environmental Microbiology, 2008
- Sex and virulence in Escherichia coli: an evolutionary perspectiveMolecular Microbiology, 2006