Antibiotic resistance patterns in Escherichia coli from gulls in nine European countries

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Title: Antibiotic resistance patterns in Escherichia coli from gulls in nine European countries
Authors: Stedt, Johan
Bonnedah, Jonas
Hernandez, Jorge
McMahon, Barry J.
et al.
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Date: Dec-2013
Abstract: Background: The prevalence of antibiotic resistant faecal indicator bacteria from humans and food production animals has increased over the last decades. In Europe, resistance levels in Escherichia coli from these sources show a south-to-north gradient, with more widespread resistance in the Mediterranean region compared to northern Europe. Recent studies show that resistance levels can be high also in wildlife, but it is unknown to what extent resistance levels in nature conform to the patterns observed in human-associated bacteria. Methods: To test this, we collected 3,158 faecal samples from breeding gulls (Larus sp.) from nine European countries and tested 2,210 randomly isolated E. coli for resistance against 10 antibiotics commonly used in human and veterinary medicine. Results: Overall, 31.5% of the gull E. coli isolates were resistant to ]1 antibiotic, but with considerable variation between countries: highest levels of isolates resistant to ]1 antibiotic were observed in Spain (61.2%) and lowest levels in Denmark (8.3%). For each tested antibiotic, the Iberian countries were either the countries with the highest levels or in the upper range in between-country comparisons, while northern countries generally had a lower proportion of resistant E. coli isolates, thereby resembling the gradient of resistance seen in human and food animal sources. Conclusion: We propose that gulls may serve as a sentinel of environmental levels of antibiotic resistant E. coli to complement studies of human-associated microbiota.
Type of material: Journal Article
Publisher: Co-Action
Copyright (published version): 2014 Johan Stedt et al.
Keywords: Escherichia Coli;Wildlife;Birds;Gulls;Antibiotic resistance;Antibiotics
DOI: 10.3402/iee.v4.21565
Language: en
Status of Item: Peer reviewed
Appears in Collections:Agriculture and Food Science Research Collection

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