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Applied and Environmental Microbiology, March 2009, p. 1769-1773, Vol. 75, No. 6
0099-2240/09/$08.00+0     doi:10.1128/AEM.02043-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Longitudinal Study of Shiga Toxin-Producing Escherichia coli Shedding in Sheep Feces: Persistence of Specific Clones in Sheep Flocks{triangledown}

Sergio Sánchez,1* Remigio Martínez,1 Alfredo García,2 Jorge Blanco,3 Jesús E. Blanco,3 Miguel Blanco,3 Ghizlane Dahbi,3 Cecilia López,3 Azucena Mora,3 Joaquín Rey,1 and Juan M. Alonso1

Patología Infecciosa y Epidemiología, Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Extremadura, 10071 Cáceres, Spain,1 Producción Animal, Centro de Investigación Finca La Orden-Valdesequera, Junta de Extremadura, 06187 Badajoz, Spain,2 Laboratorio de Referencia de E. coli, Departamento de Microbiología y Parasitología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain3

Received 3 September 2008/ Accepted 12 January 2009

To provide information on the persistence and maintenance of colonization with Shiga toxin-producing Escherichia coli (STEC) in sheep, pulsed-field gel electrophoresis analysis of STEC isolates (n = 145) belonging to serogroups O5, O91, and O146 from 39 healthy animals was performed in a 12-month longitudinal study carried out with four sheep flocks. At the flock level as well as the individual-animal level, the same clones were obtained on sampling occasions separated by as much as 11 months.

* Corresponding author. Mailing address: Patología Infecciosa y Epidemiología, Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de Extremadura, Avda. de la Universidad s/n, 10071 Cáceres, Spain. Phone: 34 927257114. Fax: 34 927257110. E-mail: sergiosp{at}unex.es

{triangledown} Published ahead of print on 23 January 2009.

Applied and Environmental Microbiology, March 2009, p. 1769-1773, Vol. 75, No. 6
0099-2240/09/$08.00+0     doi:10.1128/AEM.02043-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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