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Appl. Environ. Microbiol. doi:10.1128/AEM.00949-08
Copyright (c) 2008, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

Seagulls of Berlengas Natural Reserve of Portugal as carriers of faecal Escherichia coli harbouring extended-spectrum beta-lactamases of the CTX-M and TEM classes

University of Trás-os-Montes and Alto Douro; Veterinary Science Department, Vila Real, Portugal; Centre of Studies of Animal and Veterinary Sciences, Vila Real, Portugal; University of Trás-os-Montes and Alto Douro, Department of Genetics and Biotechnology; Institute for Biotechnology and Bioengineering, Centre of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro; Biochemistry and Molecular Biology Unit, University of La Rioja, Logroño, Spain

^* To whom correspondence should be addressed. Email: carmen.torres{at}unirioja.es.

	Abstract

Extended-spectrum-beta-lactamase-containing E. coli isolates have been detected in 11 of 57 faecal samples (19.3%) in Berlengas Island seagulls: TEM-52 (8 isolates), CTX-M-1 (1 isolate), CTX-M-14a (1 isolate), and CTX-M-32 (1 isolate). Most of the extended-spectrum-beta-lactamase-positive isolates harboured class 1 or class 2 integrons which included different antibiotic resistance gene cassettes.