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Comparison of E. coli isolates from canine UTI and human extraintestinal infections
E. coli is a commonly isolated pathogen in urinary tract infections of dogs. Are they related or even identical with the human extraintestinal isolates and could they possibly be transfered from dogs to humans?

Seventeen Escherichia coli isolates from dogs with urinary tract infection (UTI) were characterized with respect to phylogenetic background and virulence genotype. They were compared with the E. coli reference (ECOR) collection and with human clinical isolates with similar serotypes from patients with diverse extraintestinal infections.

Most of the canine urine isolates were from (virulence-associated) E. coli phylogenetic groups B2 or D, expressed papG allele III, and exhibited numerous other putative virulence genes that are characteristic of human extraintestinal pathogenic E. coli (ExPEC). Close phylogenetic and pathotypic correspondence was documented within 5 clonal groups among individual canine and human isolates, including archetypal human ExPEC strains CFT073 (O6:K2:H1), 536 (O6:K15:H31), and J96 (O4:K-:H5).

These findings suggest that canine UTI isolates, rather than being dog-specific pathogens, as previously suspected, may pose an infectious threat to humans.
Commonality between canine and human ExPEC has potentially important implications for disease prevention, antibiotic resistance avoidance, and studies of pathogenesis.

Source: Johnson JR, Stell AL, Delavari P, Murray AC, Kuskowski M, Gaastra W. (2001): Phylogenetic and pathotypic similarities between Escherichia coli isolates from urinary tract infections in dogs and extraintestinal infections in humans.
In: J Infect Dis 2001 Mar 15;183(6):897-906





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ARTICLES

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