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Infectious Disorders - Drug Targets

Author(s): Negar Azimzadeh, Abdollah Derakhshandeh, Mohammad Motamedifar* and Zahra Naziri

DOI: 10.2174/1871526519666190715152118

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Clonal Relatedness, Phylotyping and Antimicrobial Susceptibility of Extended- spectrum-beta-lactamase Producing Uropathogenic Escherichia coli Isolates from Outpatients and Inpatients

Page: [659 - 666] Pages: 8

  • * (Excluding Mailing and Handling)

Abstract

Objectives: Antibiotic resistance, phylogenetic groups and Pulsed-Field Gel Electrophoresis (PFGE) patterns were evaluated in urinary tract infection (UTI) Escherichia coli (E. coli) isolates from outpatients and inpatients.

Methods: In this study, antibiotic resistance to E. coli isolated from non-hospitalized and hospitalized patients (153 outpatients and 147 inpatients ) was evaluated in Shiraz County, Iran. Phylogenetic groups and Pulse Field Gel Electrophoresis (PFGE) patterns of 143 ESBLs-producing E. coli were also assessed.

Results: The prevalence of ESBL-producing E. coli was shown to be 46.4% and 49% in the outpatient and inpatient UTI E. coli isolates, respectively. Most ESBL-producers were detected on patients hospitalized in clinical surgery units (66.7%) and intensive care units (62.5%). Phylogenetic group D was the dominant group in both the outpatient and inpatient isolates (67.6% and 61.1%, respectively) and also in internal, clinical surgery and ICU units. PFGE results showed more relatedness (>80% similarity) among inpatient isolates. PFGE analysis of 49 ESBL-producing inpatient E.coli in hospital units revealed 17 different pulsotypes, consisting of 11 clones and 6 single patterns. There were no clonal patterns in outpatient isolates, and similarity among the outpatient isolates and also between inpatient and outpatient isolates was less than 80% (75% and 66%, respectively).

Conclusion: The results showed extreme genomic diversity among the ESBL-producing E. coli isolates in terms of the community and multiclonal dissemination of ESBL-producing E. coli isolated from hospital units.

Keywords: PFGE, ESBLs, inpatients, outpatients, Escherichia coli, urinary tract infections

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