ArticleAntibiotics (Basel, Switzerland)2016
Microarray Evaluation of Antimicrobial Resistance and Virulence of Escherichia coli Isolates from Portuguese Poultry.
Article in Antibiotics (Basel, Switzerland), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 21 citations in OpenAlex.
- Silent Reservoirs: Antibiotic-ResistantPathogens (Basel, Switzerland) · 2026Article
- Polyclonal distribution and predicted plasmid context of ESBL- and AmpC-associated resistance in chicken-derivedFrontiers in veterinary science · 2026Article
- Molecular Epidemiology and Resistant Gene Mapping of Bacterial Isolates from Houbara bustards.Current microbiology · 2025Article
- Antibiotic Resistance among Gastrointestinal Bacteria in Broilers: A Review Focused onAnimals : an open access journal from MDPI · 2023Review
- Multi-Drug and β-Lactam Resistance inAntibiotics (Basel, Switzerland) · 2022Article
- Antibiograms of Gut Flora of Poultry Farms Workers Reveal Higher Resistance Levels as Compared to Non-Workers.Infection and drug resistance · 2022Article
- Antibiotic Resistance and Virulence Profiles ofPathogens (Basel, Switzerland) · 2021Article
- Antimicrobial resistance ofFood science & nutrition · 2020Article
- Identification of Escherichia coli from broiler chickens in Jordan, their antimicrobial resistance, gene characterization and the associated risk factors.BMC veterinary research · 2019Article
- Prevalence of Antibiotic Resistance Genes in Multidrug-ResistantAntibiotics (Basel, Switzerland) · 2019Article
- Characterization of avian pathogenic Escherichia coli isolated from free-range helmeted guineafowl.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2018Article
- Antimicrobial resistance inGut pathogens · 2018Article
- Molecular Methods for Detection of Antimicrobial Resistance.Microbiology spectrum · 2017Review
- Virulence and transcriptome profile of multidrug-resistant Escherichia coli from chicken.Scientific reports · 2017Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The presence of antimicrobial resistance and virulence factors of 174 Escherichia coli strains isolated from healthy Portuguese Gallus gallus was evaluated. Resistance profiles were determined against 33 antimicrobials by microbroth dilution. Resistance was prevalent for tetracycline (70%) and ampicillin (63%). Extended-spectrum beta-lactamase (ESBL) phenotype was observed in 18% of the isolates. Multidrug resistance was found in 56% of isolates. A subset of 74 isolates were screened by DNA microarrays for the carriage of 88 antibiotic resistance genes and 62 virulence genes. Overall, 37 different resistance genes were detected. The most common were tet(A) (72%), blaTEM (68%), and sul1 (47%), while 21% isolates harbored an ESBL gene (blaCTX-M group 1, group 2, or group 9). Of these, 96% carried the increased serum survival (iss) virulence gene, while 89% presented the enterobactin siderophore receptor protein (iroN), 70% the temperature-sensitive hemagglutinin (tsh), and 68% the long polar fimbriae (lpfA) virulence genes associated with extraintestinal pathogenic E. coli. In conclusion, prevalence of antibiotic resistant E. coli from the microbiota of Portuguese chickens was high, including to extended spectrum cephalosporins. The majority of isolates seems to have the potential to trigger extraintestinal human infection due to the presence of some virulence genes. However, the absence of genes specific for enteropathogenic E. coli reduces the risk for human intestinal infection.
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