Publication: Antimicrobial Resistance of Campylobacter jejuni, Escherichia coli and Enterococcus faecalis Commensal Isolates from Laying Hen Farms in Spain
Authors
Rivera-Gomis, Jorge ; Marín, Pedro ; Martínez-Conesa, Cristina ; Otal, Julio ; Jordán, María José ; Escudero, Elisa ; Cubero, María José
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Publisher
MDPI
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DOI
https://doi.org/10.3390/ani11051284
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info:eu-repo/semantics/article
Description
Copyright: © 2021 by the authors.
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
Abstract
Antimicrobial resistance (AMR) is a global threat for human and animal health. Few
studies have been carried out in laying hens. We evaluated the antimicrobial susceptibility of
commensal Campylobacter jejuni, Escherichia coli, and Enterococcus faecalis isolates in Spanish laying
hens in 2018. The Minimum Inhibitory Concentration (MIC) was used to identify any AMR of the
studied isolates by means of a broth microdilution method. C. jejuni was highly resistant to the B
category antimicrobials, and 52% of the isolates were susceptible to all the antimicrobials tested. E. coli
showed medium and high percentages of resistance to the B and A antibiotic categories, respectively,
and 33.33% of the isolates were susceptible to all antimicrobials. The E. faecalis resistance to A category
antimicrobials was variable, and 4.62% of the isolates were susceptible to all antimicrobials. In our
work, novel data on AMR in laying hen commensal isolates in Spain is provided, and the AMR levels
differ from those reported for poultry in the EU. A high resistance to key drugs for human medicine
was found, representing a public health risk.
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