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Plasmid mediated mcr-1.1 colistin-resistance in clinical extraintestinal Escherichia coli strains isolated in Poland

ABSTRACT: Plasmid mediated colistin-resistance in E. coli isolated in Poland

PROVIDER: PRJEB42972 | ENA |

REPOSITORIES: ENA

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Plasmid Mediated <i>mcr-1.1</i> Colistin-Resistance in Clinical Extraintestinal <i>Escherichia coli</i> Strains Isolated in Poland.

Project description:Objectives: The growing incidence of multidrug-resistant (MDR) bacteria is an inexorable and fatal challenge in modern medicine. Colistin is a cationic polypeptide considered a "last-resort" antimicrobial for treating infections caused by MDR Gram-negative bacterial pathogens. Plasmid-borne mcr colistin resistance emerged recently, and could potentially lead to essentially untreatable infections, particularly in hospital and veterinary (livestock farming) settings. In this study, we sought to establish the molecular basis of colistin-resistance in six extraintestinal Escherichia coli strains. Methods: Molecular investigation of colistin-resistance was performed in six extraintestinal E. coli strains isolated from patients hospitalized in Medical University Hospital, Bialystok, Poland. Complete structures of bacterial chromosomes and plasmids were recovered with use of both short- and long-read sequencing technologies and Unicycler hybrid assembly. Moreover, an electrotransformation assay was performed in order to confirm IncX4 plasmid influence on colistin-resistance phenotype in clinical E. coli strains. Results: Here we report on the emergence of six mcr-1.1-producing extraintestinal E. coli isolates with a number of virulence factors. Mobile pEtN transferase-encoding gene, mcr-1.1, has been proved to be encoded within a type IV secretion system (T4SS)-containing 33.3 kbp IncX4 plasmid pMUB-MCR, next to the PAP2-like membrane-associated lipid phosphatase gene. Conclusion: IncX4 mcr-containing plasmids are reported as increasingly disseminated among E. coli isolates, making it an "epidemic" plasmid, responsible for (i) dissemination of colistin-resistance determinants between different E. coli clones, and (ii) circulation between environmental, industrial, and clinical settings. Great effort needs to be taken to avoid further dissemination of plasmid-mediated colistin resistance among clinically relevant Gram-negative bacterial pathogens.

| S-EPMC8703133 | biostudies-literature

Identification of a novel plasmid-mediated colistin resistant gene mcr-2 in E. coli

Project description:Identification of a novel plasmid-mediated colistin resistant gene mcr-2 in E. coli

| PRJEB14596 | ENA

Draft Genome Sequences of Colistin-Resistant and mcr-1.1-Carrying Escherichia coli Strains Isolated from Irrigation Water.

Project description:Colistin has been classified as a highest priority critically important antibiotic. However, the emergence of mobile colistin resistance (mcr) genes has threatened the therapeutic uses of colistin. Here, we report the draft genome sequences, antibiotic resistance genes, and sequence types (STs) of two multidrug-resistant and mcr-1.1-positive Escherichia coli strains isolated from irrigation water.

| S-EPMC8032466 | biostudies-literature

Aminocandin versus Aminocandin plus Colistin

Project description:We found that the antibiotic colistin acts synergistically with antifungals of the echinocandin class (e.g. aminocandin) on C. albicans cells. In order to elucidate the mode of action of colistin in fungi we performed microarray analysis of samples treated with only aminocandin (0.00125µg/ml) or treated with aminocandin (0.00125µg/ml) and colistin (5µg/ml). We compared: (A). untreated cells to cells treated with aminocandin only; (B). cells treated with aminocandin to cells treated with aminocandin and colistin (which is the focus of this experiment). By comparing those datasets it should be possible to identify genes differentially expressed in response to aminocandin and in response to both drugs. And subsequently to be able to interpret where in the cell colistin acts. (See related experiment in ArrayExpress: E-MEXP-3437 for comparison between untreated cells vs cells treated with aminocandin only.)

2012-03-03 | E-MEXP-3438 | biostudies-arrayexpress

Colistin resistant A. baumannii: genomic and transcriptomic traits acquired under colistin therapy

Project description:Comparative Genomic and Transcriptomic Characterization of Colistin-Resistant Acinetobacter baumannii

2019-01-23 | GSE109951 | GEO

A novel plasmid-encoded mcr-4.3 gene in a colistin-resistant Acinetobacter baumannii clinical strain.

Project description:ObjectivesTo identify the molecular mechanism of colistin resistance in an MDR Acinetobacter baumannii clinical strain isolated in 2008 from a meningitis case in Brazil.MethodsLong- and short-read WGS was used to identify colistin resistance genes in A. baumannii strain 597A with a colistin MIC of 64 mg/L. MS was used to analyse lipid A content. mcr was cloned into pET-26b (+) and transformed into Escherichia coli BL21(λDE3)pLysS for analysis.ResultsA novel plasmid (pAb-MCR4.3) harbouring mcr-4.3 within a Tn3-like transposon was identified. The A. baumannii 597A lipid A MS spectra showed a main molecular ion peak at m/z=2034, which indicated the addition of phosphoethanolamine to the lipid A structure. E. coli BL21 transformed with pET-26b-mcr-4.3 gained colistin resistance with a colistin MIC of 8 mg/L.ConclusionsColistin resistance in A. baumannii 597A was correlated with the presence of a novel plasmid-encoded mcr-4.3 gene.

| S-EPMC6910164 | biostudies-literature

mcr-3

Project description:Plasmid-borne colistin resistance gene mcr-3 in Salmonella isolates from human infections.

| PRJEB23266 | ENA

Coproduction of Tet(X7) Conferring High-Level Tigecycline Resistance, Fosfomycin FosA4, and Colistin Mcr-1.1 in Escherichia coli Strains from Chickens in Egypt.

Project description:The plasmid-mediated tet(X7) conferring high-level tigecycline resistance was identified in five mcr-1.1-positive Escherichia coli strains (ST10 [n = 3] and ST155 [n = 2]) isolated from chickens in Egypt. Two fosfomycin-resistant fosA4-carrying IncFII plasmids (∼79 kb in size) were detected. Transposase ISCR3 (IS91 family) is syntenic with tet(X7) in all isolates, suggesting its role in the mobilization of tet(X7). To our knowledge, this is the first global report of ST4-IncHI2 plasmids cocarrying tet(X7) and mcr-1.1 from chickens.

| S-EPMC8315911 | biostudies-literature

Multiplex PCR for detection of plasmid-mediated colistin resistance determinants, mcr-1, mcr-2, mcr-3, mcr-4 and mcr-5 for surveillance purposes.

Project description:Background and aimPlasmid-mediated colistin resistance mechanisms have been identified worldwide in the past years. A multiplex polymerase chain reaction (PCR) protocol for detection of all currently known transferable colistin resistance genes (mcr-1 to mcr-5, and variants) in Enterobacteriaceae was developed for surveillance or research purposes. Methods: We designed four new primer pairs to amplify mcr-1, mcr-2, mcr-3 and mcr-4 gene products and used the originally described primers for mcr-5 to obtain a stepwise separation of ca 200 bp between amplicons. The primer pairs and amplification conditions allow for single or multiple detection of all currently described mcr genes and their variants present in Enterobacteriaceae. The protocol was validated testing 49 European Escherichia coli and Salmonella isolates of animal origin. Results: Multiplex PCR results in bovine and porcine isolates from Spain, Germany, France and Italy showed full concordance with whole genome sequence data. The method was able to detect mcr-1, mcr-3 and mcr-4 as singletons or in different combinations as they were present in the test isolates. One new mcr-4 variant, mcr-4.3, was also identified. Conclusions: This method allows rapid identification of mcr-positive bacteria and overcomes the challenges of phenotypic detection of colistin resistance. The multiplex PCR should be particularly interesting in settings or laboratories with limited resources for performing genetic analysis as it provides information on the mechanism of colistin resistance without requiring genome sequencing.

| S-EPMC5824125 | biostudies-literature

Emergence of Plasmid-Mediated Colistin Resistance Gene mcr-1 in a Clinical Escherichia coli Isolate from Egypt.

Project description: Not available

| S-EPMC4862507 | biostudies-literature