FIG. 2.

Graphical representation of the results of the FAC carried out with the whole data from the 82 E. coli clinical strains. (A) Projections of the variables on the F1/F2 plane (defined as in Fig. 1): hly, detection of the hly operon; aer, detection of the aer operon; sfa, detection of the sfa/foc operon; ibe, detection of the ibe10 gene; pap, detection of the pap operon, afa, detection of the afa operon; K1, detection of the K1 antigen; b1, carboxylesterase B type B₁; b2, carboxylesterase B type B₂; B2, phylogenetic group B2; B1, phylogenetic group B1; A, phylogenetic group A; D, phylogenetic group D; pat, pathologic origin; co, commensal origin; 0/1, low level of lethality to mice; 2/8, medium level of lethality to mice; 9/10, high level of lethality to mice. The + and − signs after the variables indicate the presence or absence of the variable, respectively. (B) Projections of the 82 E. coli strains on the F1/F3 plane. The third axis F3, orthogonal to the F1/F2 plane, explains the largest part of the variance which is not explained by the F1/F2 plane. The strains (▴) are numbered as in Table 1, and for clarity, when several strains are projected on the same point, only one is represented.