The prevalence of 31 virulence factors was analyzed among nalidixic acid-susceptible and -resistant Escherichia coli strains from phylogenetic group B2. Hemolysin, cytotoxic necrotizing factor 1, and S and F1C fimbriae genes were less prevalent among nalidixic acid-resistant E. coli strains. Quinolone resistance may be associated with a decrease in the presence of some virulence factors.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1151912 | PMC |
| http://dx.doi.org/10.1128/JCM.43.6.2962-2964.2005 | DOI Listing |
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