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Decreased detection of ESBL- or pAmpC-producing Escherichia coli in broiler breeders imported into Sweden
Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), 751 89, Uppsala, Sweden.
Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), 751 89, Uppsala, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, 58183, Sweden.ORCID iD: 0000-0003-2219-2659
Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), 751 89, Uppsala, Sweden.
Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), 751 89, Uppsala, Sweden.
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2020 (English)In: Acta Veterinaria Scandinavica, ISSN 0044-605X, E-ISSN 1751-0147, Vol. 62, no 1, article id 33Article in journal (Refereed) Published
Abstract [en]

In the spring of 2010, it was discovered that a large proportion of broilers in Sweden were colonized with Escherichia coli producing extended-spectrum beta-lactamases (ESBL) or plasmid mediated AmpC (pAmpC). It was hypothesized that the high prevalence was due to transfer from an upper level in the production pyramid and sampling upwards in the production pyramid was initiated. From 2010 to 2019, all shipments (n = 122) of broiler breeders were screened on arrival to Sweden for the occurrence of ESBL- or pAmpC-producing E. coli using selective methods. Samples of paper linings from shipments of breeders were cultured on MacConkey agar supplemented with cefotaxime (1 mg/L) after pre-enrichment in either MacConkey broth with cefotaxime (1 mg/L), or from late June 2015 in buffered peptone water without antibiotics. ESBL- or pAmpC-producing E. coli was isolated from 43 (35%) of these. Over the years, the proportion of positive imports have decreased and during 2018 and 2019 all imports were negative. In conclusion, the occurrence of ESBL- or pAmpC-producing E. coli in broiler breeders on arrival to Sweden has decreased. Such bacteria have not been detected in any shipments since 2017.

Place, publisher, year, edition, pages
BioMed Central (BMC), 2020. Vol. 62, no 1, article id 33
Keywords [en]
Antibiotic resistance, Chickens, Spread
National Category
Microbiology
Identifiers
URN: urn:nbn:se:oru:diva-107634DOI: 10.1186/s13028-020-00532-4ISI: 000543545300001PubMedID: 32571370Scopus ID: 2-s2.0-85086919684OAI: oai:DiVA.org:oru-107634DiVA, id: diva2:1788383
Funder
Swedish Board of Agriculture, 6.2.18–14284/2018Swedish National Veterinary Institute (SVA)Available from: 2023-08-16 Created: 2023-08-16 Last updated: 2023-12-29Bibliographically approved

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