1887

Abstract

We studied 137 uropathogenic (UPEC) isolates from hospitalized adult patients (Queensland, Australia) for their resistance to 17 antimicrobial agents using the calibrated dichotomous sensitivity method and the presence of class I, II and III integron-associated integrase () genes, including functional class II , as well as the presence of , and genes, using PCR. Randomly amplified polymorphic DNA PCR, a high-resolution biochemical-fingerprinting method (PhP) and phylogenetic grouping were also used to identify the clonality of the sulphonamide-resistant isolates. One hundred and twenty (87.6 %) isolates were resistant to one or more of the tested antimicrobial drugs, with the highest resistance (70.1 %) observed against sulphafurazole (96 isolates). Of these, 84 (87.5 %) contained one or more alleles, with being the most common allele [occurring in 69 (72 %) isolates]. Only 38 of 69 (55.1 %) strains carrying the gene were positive for class I integrase. Our results indicate a high prevalence of sulphafurazole-resistant UPEC strains belonging to different clones among patients with urinary tract infection in Queensland, Australia. We also conclude that these strains carry predominantly a gene that is not commonly associated with the presence of class I integrase, indicating that it may be carried on either a bacterial chromosome or other genetic elements.

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2011-11-01
2019-10-20
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