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Applied and Environmental Microbiology, March 2000, p. 1205-1208, Vol. 66, No. 3
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

A New Shiga Toxin 2 Variant (Stx2f) from Escherichia coli Isolated from Pigeons

Herbert Schmidt,1 Jürgen Scheef,1 Stefano Morabito,2 Alfredo Caprioli,2 Lothar H. Wieler,3 and Helge Karch1,*

Institut für Hygiene und Mikrobiologie der Universität Würzburg, 97080 Würzburg,1 and Institut für Mikrobiologie und Tierseuchen der Freien Universität Berlin, 10115 Berlin,3 Germany, and Laboratorio di Medicina Veterinaria, Istituto Superiore di Sanita, Viale Regina Elena 299, 00161 Rome, Italy2

Received 14 July 1999/Accepted 10 December 1999

We have isolated Shiga toxin (Stx)-producing Escherichia coli (STEC) strains from the feces of feral pigeons which contained a new Stx2 variant gene designated stx2f. This gene is most similar to sltIIva of patient E. coli O128:B12 isolate H.I.8. Stx2f reacted only weakly with commercial immunoassays. The prevalence of STEC organisms carrying the stx2f gene in pigeon droppings was 12.5%. The occurrence of a new Stx2 variant in STEC from pigeons enlarges the pool of Stx2 variants and raises the question whether horizontal gene transfer to E. coli pathogenic to humans may occur.

* Corresponding author. Mailing address: Institut für Hygiene und Mikrobiologie der Universität Würzburg, Bau 17, Josef-Schneider-Str. 2, D-97080 Würzburg, Germany. Phone: 49/931/201-5162. Fax: 49/931/201-5166. E-mail: hkarch{at}hygiene.uni-wuerzburg.de.

Applied and Environmental Microbiology, March 2000, p. 1205-1208, Vol. 66, No. 3
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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