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Journal of Clinical Microbiology, August 2008, p. 2796-2799, Vol. 46, No. 8
0095-1137/08/$08.00+0     doi:10.1128/JCM.01008-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

High Rate of Intestinal Colonization with Extended-Spectrum-β-Lactamase-Producing Organisms in Household Contacts of Infected Community Patients{triangledown}

Aránzazu Valverde,1,2 Fabio Grill,3 Teresa M. Coque,1,2 Vicente Pintado,3 Fernando Baquero,1,2 Rafael Cantón,1,2* and Javier Cobo3

Servicio de Microbiología,1 CIBER en Epidemiología y Salud Pública (CIBERESP),2 Servicio de Enfermedades Infecciosas, Hospital Universitario Ramón y Cajal, 28034 Madrid, Spain3

Received 27 May 2008/ Accepted 6 June 2008

Fecal carriage of extended-spectrum-β-lactamase (ESBL)-producing organisms was detected in 70% of index cases of patients (n = 40) with community-acquired infections due to ESBL producers and reached 16.7% in household contacts (n = 54). A total of 66% of ESBL-producing organisms from index cases were indistinguishable from isolates from household contacts by pulsed-field gel electrophoresis. Patients with community infections and members of their households represent a reservoir for ESBL producers, increasing dispersal of resistance in healthy people.

* Corresponding author. Mailing address: Servicio de Microbiología, Hospital Universitario Ramón y Cajal, 28034 Madrid, Spain. Phone: 34913368330. Fax: 34913368809. E-mail: rcanton.hrc{at}salud.madrid.org

{triangledown} Published ahead of print on 18 June 2008.

Journal of Clinical Microbiology, August 2008, p. 2796-2799, Vol. 46, No. 8
0095-1137/08/$08.00+0     doi:10.1128/JCM.01008-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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