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Molecular Epidemiology of mcr-1-Positive Polymyxin B-Resistant Escherichia coli Producing Extended-Spectrum β-Lactamase (ESBL) in a Tertiary Hospital in Shandong, China

Open Access
|Sep 2024

Figures & Tables

Fig. 1.

A dendrogram was constructed using the similarity of pulsed-field gel electrophoresis (PFGE) patterns across the 19 strains of mcr-1 -positive polymyxin-B-resistant extended-spectrum β-lactamase-producing Escherichia coli. Names of the isolates, sequence types, serotypes, and fimH types are displayed on the right side.
A dendrogram was constructed using the similarity of pulsed-field gel electrophoresis (PFGE) patterns across the 19 strains of mcr-1 -positive polymyxin-B-resistant extended-spectrum β-lactamase-producing Escherichia coli. Names of the isolates, sequence types, serotypes, and fimH types are displayed on the right side.

Fig. 2.

Phylogenetic tree distribution of 19 strains of mcr-1-positive polymyxin-B-resistant extended-spectrum β-lactamase-producing Escherichia coli.
Phylogenetic tree distribution of 19 strains of mcr-1-positive polymyxin-B-resistant extended-spectrum β-lactamase-producing Escherichia coli.

Fig. 3.

a) Detection of resistance genes in 19 mcr-1-positive clinical strains, b) detection of resistance genes in 17 transconjugants.
a) Detection of resistance genes in 19 mcr-1-positive clinical strains, b) detection of resistance genes in 17 transconjugants.

Fig. 4.

The external ring is the schematic representation of plasmid pECO-POL-29_mcr1 (GenBank accession number PP721192). Genes are marked with different colors based on their functional annotations. The internal five rings show a comparative analysis of mcr-1-harboring plasmids with pECO-POL-29_mcr1, including pSLy21 (sky blue), pAH01-2 (light purple), pRIVM_C029515_2 (light blue), pmcr1_IncI2 (light purple pink), and pEC26-mcr-1.9 (purple) (constructed using BRIG).
The external ring is the schematic representation of plasmid pECO-POL-29_mcr1 (GenBank accession number PP721192). Genes are marked with different colors based on their functional annotations. The internal five rings show a comparative analysis of mcr-1-harboring plasmids with pECO-POL-29_mcr1, including pSLy21 (sky blue), pAH01-2 (light purple), pRIVM_C029515_2 (light blue), pmcr1_IncI2 (light purple pink), and pEC26-mcr-1.9 (purple) (constructed using BRIG).

Antibiotic susceptibility testing of Escherichia coli clinical strains, transconjugants, and the recipient bacterium J53AziR_

IsolatesMIC (μg/ml)
AMPSAMTZPCZOCTTCROCAZFEPATMETPIPMAKCNTOBCIPLEVNITSTXPOL
ECO-POL-4≥ 32≥ 32≥ 128≥ 64≥ 64≥ 64≥ 64≥ 6416≥ 8≥ 16≤ 2≤ 1≤ 1≥ 4≥ 832≥ 3208
ECO-POL-6≥ 32≥ 32≤ 4≥ 64≤ 432≥ 64≤ 116≤ 0.5≤ 1≤ 2≥ 16≥ 16≥ 4≥ 864404
ECO-POL-7≥ 32≥ 32≤ 4≥ 64≤ 4≥ 6416≥ 6416≤ 0.5≤ 1≤ 2≥ 16≥ 16≥ 4≥ 8≤ 16≥ 3204
ECO-POL-8≥ 328≤ 4≥ 64≤ 4≥ 6416216≤ 0.5≤ 1≤ 2≤ 1≤ 1≥ 4≥ 832≥ 3204
ECO-POL-9≥ 3216≤ 4≥ 64≤ 4≥ 644216≤ 0.5≤ 1≤ 2≥ 168≥ 4≥ 8≤ 16≥ 3204
ECO-POL-10≥ 3216≤ 4≥ 64≤ 4≥ 6416≥ 6416≤ 0.5≤ 1≤ 2≤ 1≤ 1≥ 4432≥ 3204
ECO-POL-15≥ 32≥ 32≤ 4≥ 64≤ 4≥ 6416≥ 64≥ 64≤ 0.5≤ 1≥ 64≥ 16≥ 16≥ 4≥ 864≤ 208
ECO-POL-17≥ 32≥ 32≤ 4≥ 64≤ 4≥ 6416≥ 64≥ 64≤ 0.5≤ 1≥ 64≥ 16≥ 16≥ 4≥ 832≤ 204
ECO-POL-18≥ 32≥ 3216≥ 64≤ 4≥ 641632≥ 64≤ 0.5≤ 116≥ 16≥ 16≥ 4≥ 8≤ 16≥ 320≥ 64
ECO-POL-19≥ 32≥ 32≤ 4≥ 64≤ 4≥ 64163232≤ 0.5≤ 1≥ 64≥ 16≥ 16≥ 4≥ 864≥ 3204
ECO-POL-21≥ 3216≤ 4≥ 64≤ 4≥ 64≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≥ 16≥ 16≥ 4≥ 864≥ 3204
ECO-POL-22≥ 32≥ 32≤ 4≥ 64≤ 4≥ 64≤ 1216≤ 0.5≤ 1≥ 64≥ 16≥ 16≥ 4≥ 864≥ 3204
ECO-POL-23≥ 3216≤ 4≥ 64≤ 4≥ 64≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≥ 16≥ 16≥ 4≥ 864≥ 3204
ECO-POL-24≥ 32≥ 32≤ 4≥ 64≤ 4≥ 64163216≤ 0.5≤ 1≤ 2≥ 168≥ 4≥ 8≤ 16≥ 3204
ECO-POL-25≥ 3216≤ 4≥ 64≤ 4≥ 644≥ 6432≤ 0.5≤ 1≤ 2≤ 1≤ 1≥ 4≥ 8128≤ 204
ECO-POL-27≥ 3216≤ 4≥ 64≤ 4≥ 644216≤ 0.5≤ 1≤ 2≥ 168≥ 4≥ 864≤ 204
ECO-POL-28≥ 32≥ 32≤ 4≥ 64≤ 4≥ 64≤ 124≤ 0.5≤ 1≥ 64≥ 16≥ 16≥ 4≥ 864≥ 3204
ECO-POL-29≥ 328≤ 4≥ 64≤ 4≥ 644216≤ 0.5≤ 1≤ 2≤ 1≤ 1≥ 4≥ 832≥ 3204
ECO-POL-30≥ 3216≤ 4≥ 64≤ 4≥ 64163216≤ 0.5≤ 1≤ 2≥ 168≥ 4≥ 8≤ 16≥ 3204
J4≥ 32≥ 3264≥ 64≤ 4≥ 6416≥ 64≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 208
J688≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J7≥ 32≥ 32≤ 4≥ 64≤ 4≥ 6416≥ 64≥ 64≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≥ 3204
J84≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J94≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 208
J10≥ 32≥ 32≤ 4≥ 64≤ 4≥ 6416≥ 64≥ 64≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J15≥ 32≥ 32≤ 4≥ 64≤ 4≥ 644216≤ 0.5≤ 1≤ 28I≥ 16≤ 0.25≤ 0.2532≤ 2016
J188≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 208
J198≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J218≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J228≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J2384≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J24≥ 32≥ 32≤ 4≥ 64≤ 4≥ 64≥ 648≥ 64≤ 0.5≤ 1≤ 2≥ 16≤ 1≤ 0.25≤ 0.25≤ 16≥ 3208
J25≥ 3216≤ 4≥ 64≤ 4≥ 6416≥ 64≥ 64≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 204
J278≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 208
J294≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 208
J30≥ 32≥ 32≤ 4≥ 64≤ 4≥ 64≥ 648≥ 64≤ 0.5≤ 1≤ 2≥ 16≤ 1≤ 0.25≤ 0.25≤ 16≥ 3208
J53AziR8≤ 2≤ 4≤ 4≤ 4≤ 1≤ 1≤ 1≤ 1≤ 0.5≤ 1≤ 2≤ 1≤ 1≤ 0.25≤ 0.25≤ 16≤ 200.125

The number, approximate size and replicon types of plasmids in 19 strains of mcr-1-positive polymyxin B-resistant Escherichia coli producing extended-spectrum β-lactamase and 17 transconjugants_

IsolatesPlasmid numbersSize (kbp)Replicon types
ECO-POL-43~ 110, ~ 65, ~ 45ColRNAI, IncFIA, IncFIC, IncFIC, IncX3
ECO-POL-66~ 210, ~ 140, ~ 110, ~ 104.5, ~ 78.2, ~ 65Col, ColRNAI, ColpVC, IncFIB, IncFII, IncHI1B, IncHI2A,
IncHI2, IncI1, IncI2, RepA, p0111
ECO-POL-75~ 220, ~ 138, ~ 100, ~ 65, ~ 54IncFIB, IncFIC, IncFII, IncHI2A, IncHI2, IncI2a,
RepA_1_pKPC-CAV1321
ECO-POL-84~ 140, ~ 100, ~ 33, ~ 21IncFIB, IncFIC, IncX4
ECO-POL-93~ 140, ~ 100, < 20Col156, Col440II, ColRNAI, IncB/O/K/Z, IncFIA, IncFIB1,
IncFIC, IncI2, IncX1, IncY
ECO-POL-104~ 140, ~ 65, ~ 34, ~ 30Col, Col156, Col8282, IncFIB, IncFII, IncI2, IncX4
ECO-POL-153~ 265, ~ 65, ~ 45Col, IncFII, IncHI2A, IncHI2, IncN, IncX1, RepA
ECO-POL-173~ 104.5, ~ 65, ~ 48Col440I, ColRNAI, IncI1, IncI2, IncN, IncR, IncX1
ECO-POL-183~ 110, ~ 104.5, ~ 65IncFIB, IncFIC, IncHI2A, IncHI2, IncI2, RepA
ECO-POL-193~ 265, ~ 140, ~ 48Col156, Col440I, IncFIB, IncFIC, IncFII, IncHI2A, IncHI2, RepA
ECO-POL-212~ 140, ~ 65Col156, IncFIB, IncFIC, IncI2
ECO-POL-223~ 180, ~ 110, ~ 65Col440II, ColRNAI, IncFIB, IncFIC, IncI2, IncI
ECO-POL-232~ 140, ~ 65Col156, IncFIB, IncFIC, IncI2
ECO-POL-242~ 140, ~ 65IncFIB, IncI2
ECO-POL-253~ 140, ~ 95, ~ 65IncB/O/K/Z, IncFIB, IncI2, p0111
ECO-POL-276~ 140, ~ 130, ~ 95, ~ 70, ~ 65, ~ 43Col(MG828), ColE10, ColRNAI, IncB/O/K/Z, IncFIB, IncFIC,
IncFII, IncI2, IncX1, p0111
ECO-POL-282~ 90, ~ 28Col, Col156, Col440I, ColRNAI, IncFIA, IncFIB, IncI, IncX1
ECO-POL-294128.293, 83.176, 62.869, 30.619IncFIB/IncFIC, IncFIC, IncI2, IncX4
ECO-POL-302~ 130, ~ 60IncFIB, IncI2
J41~ 65IncI2
J61~ 65IncI2
J74~ 103, ~ 100, ~ 65, ~ 60IncI2, IncFIB, IncFII, IncFIC
J82~ 100, ~ 33IncFIB, IncX4
J91~ 65IncI2
J103~ 65, ~ 33, ~ 30IncI2, IncX4
J151~ 255IncHI2, RepA, IncHI2A, IncN
J181~ 65IncI2
J191~ 255IncHI2A, IncHI2, RepA
J211~ 65IncI2
J221~ 65IncI2, ColRNAI
J231~ 65IncI2
J242~ 140, ~ 65IncI2, IncFIB
J251~ 65IncI2
J271~ 65IncI2
J292~ 65, ~ 33IncI2, IncX4
J302~ 140, ~ 65IncI2, IncFIB

Clinical data of patients infected with mcr-1 -positive Escherichia coli isolates producing extended-spectrum β-lactamase_

Clinical isolatesGenderDepartmentSpecimenClinical diagnosisAntimicrobial therapy
ECO-POL-4maleIntensive Care Uniturineaspiration pneumonia, ARDScefoperazone sodium/sulbactam sodium
ECO-POL-6femaleOrthopedic Oncology and Joint Surgery Departmenturinerecurrence of intradural teratomalevofloxacin, levofloxacin sodium chloride, ceftazidime
ECO-POL-7femaleGastroenterology Departmentbilepostoperative recurrence of pancreatic cancerpiperacillin/tazobactam
ECO-POL-8femaleEmergency Departmentsecretionacute purulent appendicitismeropenem sodium/sulbactam sodium
ECO-POL-9femaleUrology Departmenturineureteral stone
ECO-POL-10femaleMinimally Invasive Urology Departmenturineleft renal abscesscefotaxime
ECO-POL-15maleMinimally Invasive Urology Departmenturinepost-prostatectomy for prostate cancercefotaxime
ECO-POL-17maleGeneral Surgery Departmentpuncture fluidpost-pancreaticoduodenectomycefoperazone sodium/sulbactam sodium, imipenem/cilastatin
ECO-POL-18femaleUrology Departmenturinebilateral ureteral stonesmeropenem
ECO-POL-19femaleMinimally Invasive Urology Departmenturineurinary retentionceftriaxone sodium
ECO-POL-21maleRespiratory Departmentsputumsevere pneumoniafluconazole, cefoperazone sodium/sulbactam sodium, carbapenem
ECO-POL-22maleIntensive Care Unitdrainage fluidopen pelvic fracture with ARDSimipenem/cilastatin
ECO-POL-23maleIntensive Care Unitbronchoalveolar lavage fluidseptic shockcarbapenem, imipenem/cilastatin, daptomycin, meropenem + polymyxin B, vancomycin + fluconazole
ECO-POL-24maleTrauma and Orthopedicssecretiontraumatic hemorrhagic shockcefotaxime, clindamycin hydrochloride
ECO-POL-25femaleSpinal Surgery Departmentpuncture fluidpostoperative infection following lumbar spine surgerypenicillin, cefepime + levofloxacin, imipenem/cilastatin
ECO-POL-27maleThoracic Surgery Departmentsputumpost-chemotherapy for right upper lobe lung cancercefuroxime
ECO-POL-28maleIntensive Care Unitpusgastrointestinal bleeding, gastric ulcercefoperazone sodium/sulbactam sodium, linezolid
ECO-POL-29maleGeneral Surgery Departmentascitic puncture fluidpost-appendectomy for appendiceal cancer, colonic lesionimipenem/cilastatin
ECO-POL-30maleTrauma and Orthopedicssecretionhemorrhagic shockcefotaxime
DOI: https://doi.org/10.33073/pjm-2024-032 | Journal eISSN: 2544-4646 | Journal ISSN: 1733-1331
Language: English
Page range: 363 - 375
Submitted on: May 15, 2024
Accepted on: Jul 23, 2024
Published on: Sep 13, 2024
Published by: Polish Society of Microbiologists
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year

© 2024 Yue Liu, Qian Wang, Ting Qi, Meng Zhang, Ran Chen, Zaifeng Si, Jinmei Li, Yan Jin, Qingbing Xu, Ping Li, Yingying Hao, published by Polish Society of Microbiologists
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.