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Acquisition and dissemination of cephalosporin-resistant E.coli in migratory birds sampled at an Alaska landfill as inferred through genomic analysis
US Geol Survey, Alaska Sci Ctr, Anchorage, AK 99508 USA.
Linkoping Univ, Dept Clin & Expt Med, SE-58183 Linkoping, Sweden;Kalmar Cty Hosp, Dept Infect Dis, SE-39185 Kalmar, Sweden.
Kalmar Cty Hosp, Dept Clin Microbiol, SE-39185 Kalmar, Sweden.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Infektionssjukdomar.
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2018 (Engelska)Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, artikel-id 7361Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Antimicrobial resistance (AMR) in bacterial pathogens threatens global health, though the spread of AMR bacteria and AMR genes between humans, animals, and the environment is still largely unknown. Here, we investigated the role of wild birds in the epidemiology of AMR Escherichia coli. Using next-generation sequencing, we characterized cephalosporin-resistant E. coli cultured from sympatric gulls and bald eagles inhabiting a landfill habitat in Alaska to identify genetic determinants conferring AMR, explore potential transmission pathways of AMR bacteria and genes at this site, and investigate how their genetic diversity compares to isolates reported in other taxa. We found genetically diverse E. coli isolates with sequence types previously associated with human infections and resistance genes of clinical importance, including blaCTX-M and blaCMY. Identical resistance profiles were observed in genetically unrelated E. coli isolates from both gulls and bald eagles. Conversely, isolates with indistinguishable core-genomes were found to have different resistance profiles. Our findings support complex epidemiological interactions including bacterial strain sharing between gulls and bald eagles and horizontal gene transfer among E. coli harboured by birds. Results suggest that landfills may serve as a source for AMR acquisition and/or maintenance, including bacterial sequence types and AMR genes relevant to human health.

Ort, förlag, år, upplaga, sidor
NATURE PUBLISHING GROUP , 2018. Vol. 8, artikel-id 7361
Nationell ämneskategori
Mikrobiologi
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URN: urn:nbn:se:uu:diva-358096DOI: 10.1038/s41598-018-25474-wISI: 000431737300047PubMedID: 29743625OAI: oai:DiVA.org:uu-358096DiVA, id: diva2:1241644
Tillgänglig från: 2018-08-24 Skapad: 2018-08-24 Senast uppdaterad: 2018-08-24Bibliografiskt granskad

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