Molecular typing of Escherichia coli strains associated with threatened sea ducks and near-shore marine habitats of south-west Alaska

Tuula E. Hollmén, Chitrita Debroy, Paul L. Flint, David E. Safine, Jason L. Schamber, Ann E. Riddle, Kimberly A. Trust

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In Alaska, sea ducks winter in coastal habitats at remote, non-industrialized areas, as well as in proximity to human communities and industrial activity. We evaluated prevalence and characteristics of Escherichia coli strains in faecal samples of Steller's eiders (Polysticta stelleri; n=122) and harlequin ducks (Histrionicus histrionicus; n=21) at an industrialized site and Steller's eiders (n=48) at a reference site, and compared these strains with those isolated from water samples from near-shore habitats of ducks. The overall prevalence of E. coli was 16% and 67% in Steller's eiders and harlequin ducks, respectively, at the industrialized study site, and 2% in Steller's eiders at the reference site. Based on O and H antigen subtyping and genetic characterization by enterobacterial repetitive intergenic consensus polymerase chain reaction and pulsed-field gel electrophoresis, we found evidence of avian pathogenic E. coli (APEC) strains associated with both species and detected E. coli strains carrying virulence genes associated with mammals in harlequin ducks. Steller's eiders that carried APEC had lower serum total protein and albumin concentrations, providing further evidence of pathogenicity. The genetic profile of two E. coli strains from water matched an isolate from a Steller's eider providing evidence of transmission between near-shore habitats and birds.

Original languageEnglish (US)
Pages (from-to)262-269
Number of pages8
JournalEnvironmental Microbiology Reports
Volume3
Issue number2
DOIs
StatePublished - Apr 1 2011

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)

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