Journal
JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY
Volume 71, Issue 5, Pages 1178-1182Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jac/dkv485
Keywords
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Funding
- EU-SAFEFOODERA project EU ERA-Net [08176]
- Food Standards Agency
- FLI
- Fundacion Ramon Areces (Madrid, Spain)
- Instituto de Salud Carlos III, Spain [CD12/00492]
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ESBL genes were found in a wide variety of Escherichia coli STs with some being widely disseminated amongst isolates from animals and humans, whereas others appeared to be more restricted to isolates from specific hosts.This study aimed to compare ESBL-producing Escherichia coli causing infections in humans with infecting or commensal isolates from animals and isolates from food of animal origin in terms of the strain types, the ESBL gene present and the plasmids that carry the respective ESBL genes. A collection of 353 ESBL-positive E. coli isolates from the UK, the Netherlands and Germany were studied by MLST and ESBL genes were identified. Characterization of ESBL gene-carrying plasmids was performed using PCR-based replicon typing. Moreover, IncI1-I gamma and IncN plasmids were characterized by plasmid MLST. The ESBL-producing E. coli represented 158 different STs with ST131, ST10 and ST88 being the most common. Overall, bla(CTX-M-1) was the most frequently detected ESBL gene, followed by bla(CTX-M-15), which was the most common ESBL gene in the human isolates. The most common plasmid replicon type overall was IncI1-I gamma followed by multiple IncF replicons. ESBL genes were present in a wide variety of E. coli STs. IncI1-I gamma plasmids that carried the bla(CTX-M-1) gene were widely disseminated amongst STs in isolates from animals and humans, whereas other plasmids and STs appeared to be more restricted to isolates from specific hosts.
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