Journal
EMERGING INFECTIOUS DISEASES
Volume 14, Issue 10, Pages 1575-1583Publisher
CENTER DISEASE CONTROL
DOI: 10.3201/eid1410.080102
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- Canadian Association of Gastroenterology
- Canadian Institutes of Health Research
- McGill University Health Centre, Research Institute
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Women with urinary tract infections (UTIs) in California, USA (1999-2001), were infected with closely related or indistinguishable strains of Escherichia coli (clonal groups), which suggests point source dissemination. We compared strains of UTI-causing E. coli in California with strains causing such infections in Montreal, Quebec, Canada. Urine specimens from women with community-acquired UTIs in Montreal (2006) were cultured for E. coli. Isolates that caused 256 consecutive episodes of UTI were characterized by antimicrobial drug susceptibility profile, enterobacterial repetitive intergenic consensus 2 PCR, serotyping, Xbal and Notl pulsed-field gel electrophoresis, multilocus sequence typing, and phylogenetic typing. We confirmed the presence of drug-resistant, genetically related, and temporally clustered E. coli clonal groups that caused community-acquired UTIs in unrelated women in 2 locations and 2 different times. Two clonal groups were identified in both locations. Epidemic transmission followed by endemic transmission of UTI-causing clonal groups may explain these clusters of UTI cases.
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