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Home ยป Pilot Study of Antimicrobial-Resistant Escherichia coli in Herring Gulls (Larus argentatus) and Wastewater in the Northeastern United States
Pilot Study of Antimicrobial-Resistant Escherichia coli in Herring Gulls (Larus argentatus) and Wastewater in the Northeastern United States
Publication Type: | Journal Article |
Year of Publication: | 2011 |
Authors: | Alroy, K, Ellis, JC |
Journal: | Journal of Zoo and Wildlife Medicine |
Volume: | 42 |
Issue: | 1 |
Date Published: | 2011 |
ISBN Number: | 1042-7260 |
Keywords: | Laridae, Larus, Larus argentatus, Larus cachinnans, Larus vegae |
Abstract: | Abstract Wildlife may be an important reservoir of antibiotic-resistant bacteria and resistance genes. In this pilot study, the prevalence and patterns of antimicrobial resistance in Escherichia coli cultured from wild herring gull (Larus argentatus) feces and human wastewater at Cape Cod, Massachusetts, USA, was compared. Antimicrobial susceptibility was tested using Kirby?Bauer disk diffusion with seven antimicrobial agents. A high proportion of antimicrobial agent-resistant E. coli isolates (59.2%) were detected in wastewater samples compared with a lower prevalence of 17.5% in gull feces. In addition, there was a large proportion of isolates with intermediate susceptibility (93.0%) in gull feces. Although similar resistance patterns and shared resistance genes suggest possible wastewater contamination of the local environment, the relatively low frequency of resistance and high prevalence of intermediate susceptibility detected in E. coli cultured from gull feces depict a complex model of antimicrobial resistance among E. coli strains of wildlife origin.Abstract Wildlife may be an important reservoir of antibiotic-resistant bacteria and resistance genes. In this pilot study, the prevalence and patterns of antimicrobial resistance in Escherichia coli cultured from wild herring gull (Larus argentatus) feces and human wastewater at Cape Cod, Massachusetts, USA, was compared. Antimicrobial susceptibility was tested using Kirby?Bauer disk diffusion with seven antimicrobial agents. A high proportion of antimicrobial agent-resistant E. coli isolates (59.2%) were detected in wastewater samples compared with a lower prevalence of 17.5% in gull feces. In addition, there was a large proportion of isolates with intermediate susceptibility (93.0%) in gull feces. Although similar resistance patterns and shared resistance genes suggest possible wastewater contamination of the local environment, the relatively low frequency of resistance and high prevalence of intermediate susceptibility detected in E. coli cultured from gull feces depict a complex model of antimicrobial resistance among E. coli strains of wildlife origin. |
URL: | http://dx.doi.org/10.1638/2010-0130.1 |
Short Title: | Journal of Zoo and Wildlife Medicine |
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith