Molecular comparison of extraintestinal Escherichia coli isolates of the same electrophoretic lineages from humans and domestic animals

J Infect Dis. 2001 Jan 1;183(1):154-9. doi: 10.1086/317662. Epub 2000 Nov 28.


Molecular typing methods were used to characterize 38 Escherichia coli strains that originally were isolated from extraintestinal infections and represented 5 multilocus enzyme electrophoretic types (ETs) recovered from both humans and animals. Within each ET, the human and animal isolates did not consistently segregate by host group, according to individual virulence factors (VFs), composite VF-serotype profiles, or pulsed-field gel electrophoresis profiles. Several close matches with respect to VF-serotype profiles were identified between human and canine isolates from different locales. One canine and 2 human isolates of serogroup O6 closely resembled archetypal human pyelonephritis isolate 536 (O6:K15:H31), according to papA sequence and VF-serotype profile. These findings support the hypothesis that certain pathogenic lineages of E. coli cause disease in both humans and animals and that humans may acquire pathogenic E. coli from domestic pets.

Publication types

  • Comparative Study
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Bacterial Proteins / genetics
  • Cat Diseases / microbiology*
  • Cats
  • Cluster Analysis
  • Dog Diseases / microbiology*
  • Dogs
  • Electrophoresis, Gel, Pulsed-Field
  • Escherichia coli / classification
  • Escherichia coli / genetics*
  • Escherichia coli / pathogenicity
  • Escherichia coli Infections / microbiology*
  • Escherichia coli Infections / veterinary*
  • Escherichia coli Proteins*
  • Fimbriae Proteins
  • Genotype
  • Humans
  • Molecular Sequence Data
  • Pyelonephritis / microbiology
  • Species Specificity
  • Virulence


  • AtpA protein, E coli
  • Bacterial Proteins
  • Escherichia coli Proteins
  • Fimbriae Proteins

Associated data

  • GENBANK/AF255002
  • GENBANK/AF255003
  • GENBANK/AF255004
  • GENBANK/AF287159