ArticleIrish veterinary journal2021
Resistance and virulence distribution in enterococci isolated from broilers reared in two farming systems.
Article in Irish veterinary journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 21 citations in OpenAlex.
- Regional phenotypic surveillance of antimicrobial susceptibility in chicken-associated commensalFrontiers in veterinary science · 2026Article
- The Role of the Environment (Water, Air, Soil) in the Emergence and Dissemination of Antimicrobial Resistance: A One Health Perspective.Antibiotics (Basel, Switzerland) · 2025Review
- Antimicrobial Resistance in Commensal Bacteria from Large-Scale Chicken Flocks in the Dél-Alföld Region of Hungary.Veterinary sciences · 2025Article
- The prevalence of antimicrobial resistance of bacterial strains from large-scale healthy chicken flocks in the Észak-Alföld region of Hungary.Frontiers in veterinary science · 2025Article
- Tracking the Prevalence of Antibiotic Resistance inAntibiotics (Basel, Switzerland) · 2024Article
- Antimicrobial Susceptibility Profiles of CommensalAntibiotics (Basel, Switzerland) · 2024Article
- Occurrence of Antimicrobial-ResistantAntibiotics (Basel, Switzerland) · 2024Article
- In Vitro Evaluation of Phytobiotic Mixture Antibacterial Potential againstInternational journal of molecular sciences · 2024Article
- Multidrug Resistance in Enterococci Isolated from Cheese and Capable of Producing Benzalkonium Chloride-Resistant Biofilms.Biology · 2023Article
- Antimicrobial resistance patterns and characterisation of emerging beta-lactamase-producing Escherichia coli in camels sampled from Northern Kenya.Veterinary medicine and science · 2023Article
- Antibiotic Resistance among Gastrointestinal Bacteria in Broilers: A Review Focused onAnimals : an open access journal from MDPI · 2023Review
- Prevalence and antimicrobial resistance patterns ofJAC-antimicrobial resistance · 2022Article
- Antibiotic Resistance Genes Occurrence in Conventional and Antibiotic-Free Poultry Farming, Italy.Animals : an open access journal from MDPI · 2022Article
- Antimicrobial Resistance, Biofilm Formation, and Virulence Genes inAntibiotics (Basel, Switzerland) · 2022Article
- Microbial Ecology of Sheep Milk, Artisanal Feta, and Kefalograviera Cheeses. Part II: Technological, Safety, and Probiotic Attributes of Lactic Acid Bacteria Isolates.Foods (Basel, Switzerland) · 2022Article
- Assessment of listing and categorisation of animal diseases within the framework of the Animal Health Law (Regulation (EU) No 2016/429): antimicrobial-resistantEFSA journal. European Food Safety Authority · 2022Article
Corrections and comments
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
Abstract
backgroundThe impact of enterococci in human health has been growing for the last decades, mainly due to their resistance to several antimicrobial agents. Human consumption of contaminated meat, especially poultry, has been identified as a possible route of transmission. The aim of the present study was to evaluate and compare the antimicrobial resistance profiles and virulence genes of enterococci isolated from Portuguese conventional and free-range broiler farms.
resultsAntibiotic susceptibility testing showed high frequencies of resistance to tetracycline in both farming systems. Resistance to erythromycin and gentamicin were detected in about half of the isolates. Resistance to penicillin was the less frequently observed and no vancomycin resistant isolates were identified. The majority of the enterococcal isolates, from either farming systems, were resistant to more than one antibiotic, and no statistical associations were found, except for penicillin resistance which associated with the genetic clusters. No differences were found between farming systems regarding the prevalence of tet(M), erm(B), aac (6')-Ie-aph (2″)-Ia and pbp5 genes, nevertheless pbp5 prevalence was associated with the different genetic clusters. Hemolytic activity was identified in 26.47% of all isolates and gelatinase activity in 50%. The gelE gene was identified in the majority of the isolates, whereas esp and agg genes were rarely detected. The cylA determinant was not detected in any of the isolates.
conclusionsOverall, results suggest that similar resistance patterns and virulence genes can be found in both farming systems, though enterococci in free-range conditions should be less prone to acquire further resistance genes.
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Registered trials
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