4.6 Article

Extended-spectrum β-lactamase-producing Escherichia coli strains in the feces of carriers contribute substantially to urinary tract infections in these patients

Journal

INFECTION
Volume 39, Issue 5, Pages 467-471

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s15010-011-0128-2

Keywords

Extended-spectrum beta-lactamase; Fecal carriage; Urinary tract infection; Carrier

Funding

  1. Ministry of Education, Culture, Sports, Science and Technology, Japan
  2. Grants-in-Aid for Scientific Research [23590505] Funding Source: KAKEN

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Introduction The current increase in the incidence of urinary tract infections (UTIs) worldwide caused by extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli may be due to the high number of ESBL-producing Enterobacteriaceae carriers in the community. However, whether ESBL-producing bacteria can cause UTIs in carriers remains uncertain. Materials and methods In this study, 21 fecal carriers of ESBL-producing Enterobacteriaceae were assessed for UTIs caused by ESBL-producing E. coli. Bacterial isolates obtained from patients' urine and stool specimens were phenotypically and genotypically examined. Clonal similarities of isolates were assessed by multilocus sequence typing (MLST) and random amplified polymorphic DNA (RAPD) fingerprinting. Results The study revealed that 9 of 21 carriers developed UTIs, and genetic analysis showed that 44% of the UTIs developed were caused by the same ESBL-producing E. coli as that found in the feces of the patients. Conclusions The ESBL-producing E. coli in carriers can cause UTIs.

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