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Comparison of Extended-Spectrum beta-Lactamase (ESBL) CTX-M Genotypes in Franklin Gulls from Canada and Chile
Linnaeus Univ, Sch Nat Sci, Ctr Ecol & Evolut Microbial Model Syst, SE-39182 Kalmar, Sweden.;Kalmar Cty Hosp, Dept Infect Dis, SE-39185 Kalmar, Sweden..
Linnaeus Univ, Sch Nat Sci, Ctr Ecol & Evolut Microbial Model Syst, SE-39182 Kalmar, Sweden..
Linnaeus Univ, Sch Nat Sci, Ctr Ecol & Evolut Microbial Model Syst, SE-39182 Kalmar, Sweden..
Linnaeus Univ, Sch Nat Sci, Ctr Ecol & Evolut Microbial Model Syst, SE-39182 Kalmar, Sweden..
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2015 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, no 10, e0141315Article in journal (Refereed) Published
Abstract [en]

Migratory birds have been suggested to contribute to long-distance dispersal of antimicrobial resistant bacteria, but tests of this hypothesis are lacking. In this study we determined resistance profiles and genotypes of ESBL-producing bacteria in randomly selected Escherichia coli from Franklin's gulls (Leucophaeus pipixcan) at breeding sites in Canada and compared with similar data from the gulls' wintering grounds in Chile. Resistant E. coli phenotypes were common, most notably to ampicillin (30.1%) and cefadroxil (15.1%). Furthermore, 17.0% of the gulls in Canada carried ESBL producing bacteria, which is higher than reported from human datasets from the same country. However, compared to gulls sampled in Chile (30.1%) the prevalence of ESBL was much lower. The dominant ESBL variants in Canada were bla(CTX-M-14) and bla(CTX-M-15) and differed in proportions to the data from Chile. We hypothesize that the observed differences in ESBL variants are more likely linked to recent exposure to bacteria from anthropogenic sources, suggesting high local dissemination of resistant bacteria both at breeding and non-breeding times rather than a significant trans-hemispheric exchange through migrating birds.

Place, publisher, year, edition, pages
2015. Vol. 10, no 10, e0141315
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Microbiology in the medical area
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URN: urn:nbn:se:uu:diva-267200DOI: 10.1371/journal.pone.0141315ISI: 000363309200092PubMedID: 26496629OAI: oai:DiVA.org:uu-267200DiVA: diva2:872516
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Swedish Research Council, 2008-326
Available from: 2015-11-19 Created: 2015-11-19 Last updated: 2017-12-01Bibliographically approved

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Olsen, Björn

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Clinical Microbiology and Infectious MedicineDepartment of Medical Biochemistry and MicrobiologyInfectious Diseases
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