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  • Title: Prevalence of urovirulence genes cnf, hlyD, sfa/foc, and papGIII in fecal Escherichia coli from healthy dogs and their owners.
    Author: Stenske KA, Bemis DA, Gillespie BE, Oliver SP, Draughon FA, Matteson KJ, Bartges JW.
    Journal: Am J Vet Res; 2009 Nov; 70(11):1401-6. PubMed ID: 19878023.
    Abstract:
    OBJECTIVE: To determine the prevalence of 4 urovirulence genes in fecal Escherichia coli isolates from healthy dogs and their owners and to determine whether detection of E coli strains with these genes was associated with a history of urinary tract infection (UTI). SAMPLE POPULATION: 61 healthy dog-owner pairs and 30 healthy non-dog owners. PROCEDURES: A fecal specimen was obtained from each participant, and 3 colonies of E coli were isolated from each specimen. A multiplex PCR assay was used to detect 4 genes encoding virulence factors: cytotoxic necrotizing factor (cnf), hemolysin (hlyD), s-fimbrial and F1C fimbriae adhesin (sfa/foc), and pilus associated with pyelonephritis G allele III (papGIII). Human participants completed a questionnaire to provide general information and any history of UTI for themselves and, when applicable, their dog. RESULTS: 26% (16/61) of dogs, 18% (11/61) of owners, and 20% (6/30) of non-dog owners had positive test results for >or= 1 E coli virulence gene. One or more genes were identified in fecal E coli isolates of both dog and owner in 2% (1/61) of households. There was no difference in the detection of any virulence factor between dog-owner pairs. Female owner history of UTI was associated with detection of each virulence factor in E coli strains isolated from their dogs' feces. CONCLUSIONS AND CLINICAL RELEVANCE: Dogs and humans harbored fecal E coli strains possessing the genes cnf, hlyD, sfa/foc, and papGIII that encode urovirulence factors. It was rare for both dog and owner to have fecal E coli strains with these virulence genes.
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