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Antimicrobial Agents and Chemotherapy, April 2007, p. 1527-1529, Vol. 51, No. 4
0066-4804/07/$08.00+0     doi:10.1128/AAC.00780-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

First Report of Plasmid-Mediated qnrA1 in a Ciprofloxacin-Resistant Escherichia coli Strain in Latin America{triangledown}

Mariana Castanheira,1* Andrea S. Pereira,1 Adriana G. Nicoletti,1 Antônio C. C. Pignatari,1 Afonso L. Barth,2 and Ana C. Gales1

Laboratório ALERTA, Infectious Diseases Division, Universidade Federal de São Paulo, Sao Paolo, Brazil,1 Unidade de Microbiologia, Serviço de Patologia Clínica, Hospital de Clínicas, Porto Alegre, RS, Brazil2

Received 29 June 2006/ Returned for modification 30 July 2006/ Accepted 27 December 2006

Among 144 ciprofloxacin-resistant Escherichia coli isolated in Brazil, one (0.69%) QnrA1-producing isolate was detected. The qnrA1 gene was associated with ISCR1. The QnrA1 determinant was carried on a 41-kb conjugative plasmid, which also carried a FOX-type cephalosporinase encoding gene and a class 1 integron with the aadB and catB3 cassettes. This is the first report of a qnrA-carrying isolate in a Latin American country.

* Corresponding author. Mailing address: Laboratório ALERTA, Universidade Federal de São Paulo, Rua Pedro de Toledo, 781 6o Andar, São Paulo, SP Brazil 04039-032. Phone: 55 11 5084-6538. Fax: 55 11 5571-5180. E-mail: maricastanh{at}yahoo.com

{triangledown} Published ahead of print on 12 January 2007.

Antimicrobial Agents and Chemotherapy, April 2007, p. 1527-1529, Vol. 51, No. 4
0066-4804/07/$08.00+0     doi:10.1128/AAC.00780-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.





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