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JAC Advance Access published online on August 10, 2006
Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dkl326
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© The Author 2006. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org
Received March 22, 2006
Revised July 6, 2006
Accepted July 14, 2006

Original article

Phylogenetic background and carriage of pathogenicity island-like domains in relation to antibiotic resistance profiles among Escherichia coli urosepsis isolates

Véronique Houdouin 1, Stéphane Bonacorsi 1, Philippe Bidet 1, Martine Bingen-Bidois 2, Dominique Barraud 2, and Edouard Bingen 1 *

1 Laboratoire d'études de génétique bactérienne dans les infections de l'enfant (EA3105), Université Denis Diderot-Paris 7, AP-HP, Hôpital Robert Debré, Service de Microbiologie, 75019 Paris, France
2 Laboratoire de Bactériologie, Centre Hospitalier de Gonesse, Gonesse, France

* To whom correspondence should be addressed.
Edouard Bingen, E-mail: edouard.bingen{at}rdb.ap-hop-paris.fr


  Abstract

We studied 100 well-characterized E. coli blood isolates from patients with urosepsis for their susceptibility to nalidixic acid, ampicillin and trimethoprim-sulfamethoxazole, according to prevalence of virulence factors, phylogenetic groups and subgroups, PAI IIJ96-like domains (determined by physical linkage of cnf1, hly and hra) and PAI ICFT073-like domains (determined by physical linkage of papGII to the hly locus). Nalidixic acid resistance was associated with a lower prevalence of sfa/foc, K1 antigen, pathogenicity island IIJ96-like domains, subgroup B2/I and a shift towards group A.

Keywords: virulence factors; ribotyping; quinolones; PCR.
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