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Antimicrobial Agents and Chemotherapy, April 2007, p. 1545-1548, Vol. 51, No. 4
0066-4804/07/$08.00+0     doi:10.1128/AAC.01275-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Dissemination of sul3-Containing Elements Linked to Class 1 Integrons with an Unusual 3' Conserved Sequence Region among Salmonella Isolates{triangledown}

Patrícia Antunes,1,2 Jorge Machado,3 and Luísa Peixe2*

Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal,1 REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal,2 Instituto Nacional de Saúde Dr. Ricardo Jorge, Lisboa, Portugal3

Received 11 October 2006/ Returned for modification 26 December 2006/ Accepted 27 January 2007

A sul3 domain (IS440-sul3-orf1-IS26) was found linked to an unusual 3' conserved sequence region (qacH) of class 1 integrons and detected among nontyphoid Salmonella isolates (n = 47) from different sources. Three types of integrons differing in the gene cassette array (dfrA12-orfF-aadA2-cmlA1-aadA1, dfrA12-orfF-aadA2/1, and estX-psp-aadA2-cmlA1-aadA1) were found associated with this sul3 domain. They were associated with particular clones and specific high-molecular-weight plasmids.

* Corresponding author. Mailing address: Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, no. 164, 4050-047 Porto, Portugal. Phone: 351 22 2078972. Fax: 351 22 2003977. E-mail: lpeixe{at}ff.up.pt

{triangledown} Published ahead of print on 5 February 2007.

Antimicrobial Agents and Chemotherapy, April 2007, p. 1545-1548, Vol. 51, No. 4
0066-4804/07/$08.00+0     doi:10.1128/AAC.01275-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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