Figure 2.

Escherichia coli strains isolated from 6 household members during 3 rounds of fecal sampling over 19 weeks. Household member symbols: large figures, parents; small figures, children; figures in skirts, females; animal, pet dog. Colors indicate different pulsed-field gel electrophoresis types (strains). Up to 10 E. coli colonies (as available) per fecal sample were analyzed; size of circles is independent of the proportional prevalence of the strain in the sample. The first fecal sample of the index patient was collected during a urinary tract infection (UTI), all other samples are not associated with UTI episodes.