Figure 3.

Bacterial characteristics and ecological behavior of colonizing Escherichia coli strains. Circles represent the 8 different fecal E. coli strains. Shading pattern within circle indicates phylogroup (hatched, group A; none, group B1; solid, group B2). Size of circle reflects number of fecal samples (of 18 total) from which the strain was isolated (15 for 903; 6 for 1701; 4 for 1837; 3 each for 1908, 583, and 1835; and 2 each for 1836 and 1924). Number within or near the circle indicates the number of human household members (of 6) from whom the strain was isolated.