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Applied and Environmental Microbiology, July 2009, p. 4904-4908, Vol. 75, No. 14
0099-2240/09/$08.00+0     doi:10.1128/AEM.02945-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Dispersion of Multidrug-Resistant Enterococcus faecium Isolates Belonging to Major Clonal Complexes in Different Portuguese Settings{triangledown}

Ana R. Freitas,1,2 Carla Novais,1,3 Patricia Ruiz-Garbajosa,2,4,5 Teresa M. Coque,2,4,5,{dagger} and Luísa Peixe1,{dagger}*

REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal,1 Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain,2 Faculdade Ciências da Saúde, Universidade Fernando Pessoa, Porto, Portugal,3 CIBER en Epidemiología y Salud Pública (CIBERESP), Madrid, Spain,4 Unidad de Resistencia a Antibióticos y Virulencia Bacteriana Asociada al Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain5

Received 25 December 2008/ Accepted 12 May 2009

The population structure of 56 Enterococcus faecium isolates selected from a collection of enterococci from humans, animals, and the environment in Portugal (1997 to 2007) was analyzed by multilocus sequence typing. We identified 41 sequence types clustering into CC17, CC5, CC9, CC22 and CC94, all clonal lineages comprising isolates from different hosts. Our findings highlight the role of community-associated hosts as reservoirs of enterococci able to cause human infections.

* Corresponding author. Mailing address: Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, 164, 4050-047 Porto, Portugal. Phone: 351-2-22078946. Fax: 351-2-22003977. E-mail: lpeixe{at}ff.up.pt

{triangledown} Published ahead of print on 15 May 2009.

{dagger} Luísa Peixe and Teresa M. Coque contributed equally to the direction, preparation, and writing of the manuscript.

Applied and Environmental Microbiology, July 2009, p. 4904-4908, Vol. 75, No. 14
0099-2240/09/$08.00+0     doi:10.1128/AEM.02945-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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