Characterization of ESBLs and associated quinolone resistance in escherichia coli and klebsiella pneumoniae isolates from an urban wastewater treatment plant in Algeria

  1. Alouache, S. 3
  2. Estepa, V. 1
  3. Messai, Y. 3
  4. Ruiz, E. 1
  5. Torres, C. 1
  6. Bakour, R. 3
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 High National School of Marine Sciences and Coastal Management, Campus Universitaire de Dely-Ibrahim, Algiers, Algeria
  3. 3 University of Sciences and Technology Houari Boumediene
    info

    University of Sciences and Technology Houari Boumediene

    Argel, Argelia

    ROR https://ror.org/02kb89c09

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Revista:
Microbial Drug Resistance

ISSN: 1076-6294

Año de publicación: 2014

Volumen: 20

Número: 1

Páginas: 30-38

Tipo: Artículo

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DOI: 10.1089/MDR.2012.0264 SCOPUS: 2-s2.0-84893763103 WoS: WOS:000331384800005 GOOGLE SCHOLAR

Otras publicaciones en: Microbial Drug Resistance

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2013/00001/001

Resumen

The aim of the study was the characterization of extended spectrum beta-lactamases (ESBLs) and quinolone resistance in cefotaxime-resistant coliform isolates from a wastewater treatment plant (WWTP). ESBLs were detected in 19 out of 24 isolates (79%) from raw water and in 21 out of 24 isolates (87.5%) from treated water, identified as Klebsiella pneumoniae and Escherichia coli. Molecular characterization of ESBLs and quinolone resistance showed allele profiles CTX-M-15 (3), CTX-M-3 (5), CTX-M-15+qnrB1 (1), CTX-M-3+qnrB1 (1), CTX-M-15+aac-(6′)-Ib-cr (4), and CTX-M-15+qnrB1+aac-(6′)-Ib-cr (7). A double mutation S83L and D87N (GyrA) and a single mutation S80I (ParC) were detected in ciprofloxacin-resistant E. coli isolates. In K. pneumoniae, mutations S83I (GyrA)+S80I (ParC) or single S80I mutation were detected in ciprofloxacin-resistant isolates, and no mutation was observed in ciprofloxacin-susceptible isolates. blaCTX-M, qnrB1, and aac-(6′)-Ib-cr were found, respectively, in these genetic environments: ISEcp1-blaCTX-M-orf477, orf1005-orf1-qnrB1, and Tn1721-IS26-aac-(6')- Ib-cr-blaOXA-1-catB4. blaCTX-M-15 was located on IncF plasmid in E. coli and blaCTX-M-3 on IncL/M plasmid in both species (E. coli and K. pneumoniae). E. coli isolates were affiliated to the phylogroups/MLST: D/ST405 (CC405), A/ST10 (CC10), A/ST617 (CC10), and B1/ST1431. K. pneumoniae isolates belonged to phylogroup KpI and to sequence types ST15, ST17, ST36, ST48, ST54, and ST147. The study showed a multi-drug resistance at the inflow and outflow of the WWTP, with ESBL production, plasmid-mediated quinolones resistance, and mutations in topoisomerases. The findings highlight the similarity of antibiotic resistance mechanisms in the clinical setting and the environment, and the role of the latter as a source of dissemination of resistance genes. © Copyright 2014, Mary Ann Liebert, Inc. 2014.