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Environ Microbiol Rep. 2010 Oct;2(5):641-5. doi: 10.1111/j.1758-2229.2010.00148.x.

CTX-M-15-type extended-spectrum beta-lactamases-producing Escherichia coli from wild birds in Germany.

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Institut für Mikrobiologie und Tierseuchen, Fachbereich Veterinärmedizin, Freie Universität Berlin, Germany. Federal Institute for Risk assessment (BfR), Department of Biological Safety, National Reference Laboratory for Antimicrobial Resistance (NRL-AR), Berlin, Germany. Justus von Liebig Universität, Fachbereich Veterinärmedizin, Gießen, Germany. ProRing e.V., Schenkenberg, Germany.


The isolation of Escherichia coli from wild birds in Germany revealed the occurrence of four CTX-M-15-producing strains from four different birds (2.3% of 172 isolates). CTX-M producers were recovered from two Eurasian Blackbirds, one Rock Pigeon and a Greater White-fronted Goose. All CTX-M-producing E. coli revealed a clonal relationship as determined by pulsed-field gel electrophoresis (PFGE) and were assigned to multilocus sequence type (ST) 648. Our findings suggest the emergence of a new clone with epidemiological importance and strengthen the role of wild bird species other than waterfowl as possible reservoirs of ESBL-producing Enterobacteriaceae.

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