Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 370, Issue -, Pages 219-224Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2017.12.053
Keywords
Escherichia coli; ESBLs; Tadarida teniotis; Antimicrobial resistance; Pollution
Categories
Funding
- Research Unit on Applied Molecular Biosciences (UCIBIO) - national funds from FCT/MEC [UID/Multi/04378/2013]
- ERDF [POCI-01-0145-FEDER-007728]
- Fundacao para Ciencia e Tecnologia (FCT) [LTER/BIA-BEC/0004/2009]
- EDP Biodiversity Chair
- FCT [PD/BD/52606/2014]
- Fundação para a Ciência e a Tecnologia [LTER/BIA-BEC/0004/2009, PD/BD/52606/2014] Funding Source: FCT
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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 Pollution 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. (C) 2017 Elsevier B.V. All rights reserved.
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