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Antimicrobial Agents and Chemotherapy, February 2005, p. 836-839, Vol. 49, No. 2
0066-4804/05/$08.00+0     doi:10.1128/AAC.49.2.836-839.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Dissemination of Sulfonamide Resistance Genes (sul1, sul2, and sul3) in Portuguese Salmonella enterica Strains and Relation with Integrons

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

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

Received 5 July 2004/ Returned for modification 16 September 2004/ Accepted 17 October 2004

In 200 sulfonamide-resistant Portuguese Salmonella isolates, 152 sul1, 74 sul2, and 14 sul3 genes were detected. Class 1 integrons were always associated with sul genes, including sul3 alone in some isolates. The sul3 gene has been identified in isolates from different sources and serotypes, which also carried a class 1 integron with aadA and dfrA gene cassettes.

* Corresponding author. Mailing address: Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Rua Aníbal Cunha, n°164, 4050-047 Porto, Portugal. Phone: 351 22 2078972. Fax: 351 22 2003977. E-mail: lpeixe{at}ff.up.pt.

Antimicrobial Agents and Chemotherapy, February 2005, p. 836-839, Vol. 49, No. 2
0066-4804/05/$08.00+0     doi:10.1128/AAC.49.2.836-839.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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