1
|
Zając M, Sztromwasser P, Bortolaia V, Leekitcharoenphon P, Cavaco LM, Ziȩtek-Barszcz A, Hendriksen RS, Wasyl D. Occurrence and Characterization of mcr-1-Positive Escherichia coli Isolated From Food-Producing Animals in Poland, 2011-2016. Front Microbiol 2019; 10:1753. [PMID: 31440216 PMCID: PMC6694793 DOI: 10.3389/fmicb.2019.01753] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 07/15/2019] [Indexed: 11/23/2022] Open
Abstract
The emergence of plasmid-mediated colistin resistance (mcr genes) threatens the effectiveness of polymyxins, which are last-resort drugs to treat infections by multidrug- and carbapenem-resistant Gram-negative bacteria. Based on the occurrence of colistin resistance the aims of the study were to determine possible resistance mechanisms and then characterize the mcr-positive Escherichia coli. The research used material from the Polish national and EU harmonized antimicrobial resistance (AMR) monitoring programs. A total of 5,878 commensal E. coli from fecal samples of turkeys, chickens, pigs, and cattle collected in 2011-2016 were screened by minimum inhibitory concentration (MIC) determination for the presence of resistance to colistin (R) defined as R > 2 mg/L. Strains with MIC = 2 mg/L isolated in 2014-2016 were also included. A total of 128 isolates were obtained, and most (66.3%) had colistin MIC of 2 mg/L. PCR revealed mcr-1 in 80 (62.5%) isolates recovered from 61 turkeys, 11 broilers, 2 laying hens, 1 pig, and 1 bovine. No other mcr-type genes (including mcr-2 to -5) were detected. Whole-genome sequencing (WGS) of the mcr-1-positive isolates showed high diversity in the multi-locus sequence types (MLST) of E. coli, plasmid replicons, and AMR and virulence genes. Generally mcr-1.1 was detected on the same contig as the IncX4 (76.3%) and IncHI2 (6.3%) replicons. One isolate harbored mcr-1.1 on the chromosome. Various extended-spectrum beta-lactamase (bla SHV-12, bla CTX-M-1, bla CTX-M-15, bla TEM-30, bla TEM-52, and bla TEM-135) and quinolone resistance genes (qnrS1, qnrB19, and chromosomal gyrA, parC, and parE mutations) were present in the mcr-1.1-positive E. coli. A total of 49 sequence types (ST) were identified, ST354, ST359, ST48, and ST617 predominating. One isolate, identified as ST189, belonged to atypical enteropathogenic E. coli. Our findings show that mcr-1.1 has spread widely among production animals in Poland, particularly in turkeys and appears to be transferable mainly by IncX4 and IncHI2 plasmids spread across diverse E. coli lineages. Interestingly, most of these mcr-1-positive E. coli would remain undetected using phenotypic methods with the current epidemiological cut-off value (ECOFF). The appearance and spread of mcr-1 among various animals, but notably in turkeys, might be considered a food chain, and public health hazard.
Collapse
Affiliation(s)
- Magdalena Zając
- Department of Microbiology, National Veterinary Research Institute, Puławy, Poland
| | - Paweł Sztromwasser
- Department of Omics Analyses, National Veterinary Research Institute, Puławy, Poland
| | - Valeria Bortolaia
- Research Group for Genomic Epidemiology, European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Centre for Antimicrobial Resistance in Foodborne Pathogens and Genomics, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Pimlapas Leekitcharoenphon
- Research Group for Genomic Epidemiology, European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Centre for Antimicrobial Resistance in Foodborne Pathogens and Genomics, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Lina M. Cavaco
- Statens Serum Institute, Copenhagen University, Copenhagen, Denmark
| | - Anna Ziȩtek-Barszcz
- Department of Epidemiology, National Veterinary Research Institute, Puławy, Poland
| | - Rene S. Hendriksen
- Research Group for Genomic Epidemiology, European Union Reference Laboratory for Antimicrobial Resistance, WHO Collaborating Centre for Antimicrobial Resistance in Foodborne Pathogens and Genomics, National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Dariusz Wasyl
- Department of Microbiology, National Veterinary Research Institute, Puławy, Poland
- Department of Omics Analyses, National Veterinary Research Institute, Puławy, Poland
| |
Collapse
|
2
|
Abstract
Polymyxins are important lipopeptide antibiotics that serve as the last-line defense against multidrug-resistant (MDR) Gram-negative bacterial infections. Worryingly, the clinical utility of polymyxins is currently facing a serious threat with the global dissemination of mcr, plasmid-mediated polymyxin resistance. The first plasmid-mediated polymyxin resistance gene, termed as mcr-1 was identified in China in November 2015. Following its discovery, isolates carrying mcr, mainly mcr-1 and less commonly mcr-2 to -7, have been reported across Asia, Africa, Europe, North America, South America and Oceania. This review covers the epidemiological, microbiological and genomics aspects of this emerging threat to global human health. The mcr has been identified in various species of Gram-negative bacteria including Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, Salmonella enterica, Cronobacter sakazakii, Kluyvera ascorbata, Shigella sonnei, Citrobacter freundii, Citrobacter braakii, Raoultella ornithinolytica, Proteus mirabilis, Aeromonas, Moraxella and Enterobacter species from animal, meat, food product, environment and human sources. More alarmingly is the detection of mcr in extended-spectrum-β-lactamases- and carbapenemases-producing bacteria. The mcr can be carried by different plasmids, demonstrating the high diversity of mcr plasmid reservoirs. Our review analyses the current knowledge on the emergence of mcr-mediated polymyxin resistance.
Collapse
Affiliation(s)
- Sue C Nang
- a Department of Microbiology, Monash Biomedicine Discovery Institute , Monash University , Melbourne , Australia
| | - Jian Li
- a Department of Microbiology, Monash Biomedicine Discovery Institute , Monash University , Melbourne , Australia
| | - Tony Velkov
- b Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences , The University of Melbourne , Parkville , Australia
| |
Collapse
|
3
|
Culligan EP, Sleator RD. Antibiotics v2.0: computational and synthetic biology approaches to combat antibiotic resistance. Future Microbiol 2017; 12:267-269. [PMID: 28287301 DOI: 10.2217/fmb-2017-0005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Eamonn P Culligan
- Department of Biological Sciences, Cork Institute of Technology, Bishopstown, Cork, Ireland
| | - Roy D Sleator
- Department of Biological Sciences, Cork Institute of Technology, Bishopstown, Cork, Ireland
| |
Collapse
|