First report on extended-spectrum beta-lactamase (ESBL) producing Escherichia coli from European free-tailed bats (Tadarida teniotis) in Portugal: A one-health approach of a hidden contamination problem

Andreia Garcês, Susana Correia, Francisco Amorim, José Eduardo Pereira, Gilberto Igrejas, Patrícia Poeta

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

The main aim of this study was to characterize the diversity of extended-spectrum beta-lactamases (ESBLs) in Escherichia coli isolates from European free tailed-bats (Tadarida teniotis) in Portugal. ESBL-producing E. coli isolates were recovered from 14 of 146 faecal samples (9.6%) and a total of 19 isolates were completely characterized. The more prevalent beta-lactamase genes detected were bla CTX-M-1 (57.9%) and bla CTX-M-3 (36.8%), followed by bla SHV (31.6%), bla TEM (21.1%), bla OXA (10.5%) and bla CTX-M-9 (10.5%). Among other associated resistance genes studied, tet(A) and tet(B) were predominant and fimA was the main virulence factor detected. Phylogroups D (47.4%) and A (31.6%) were the more prevalent, followed by group B2 (21.1%). Bats are reservoirs of antimicrobial-resistant bacteria and resistance determinants and is important in further studies to identify the main sources of pollution in the environment, such as water or insects that may contain these multiresistant organisms.

Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalJournal of Hazardous Materials
Volume370
Issue numberSI
DOIs
Publication statusPublished - 15 May 2019
Event2nd International Caparica Conference on Pollutant Toxic Ions and Molecules (PTIM) - Caparica, Portugal
Duration: 4 Nov 20197 Nov 2019

Keywords

  • Antimicrobial resistance
  • ESBLs
  • Escherichia coli
  • Pollution
  • Tadarida teniotis

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