The Link between Phylogeny and Virulence inEscherichia coli Extraintestinal Infection

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 thesfa/foc operon; ibe, detection of the ibe10 gene; pap, detection of the pap operon, afa, detection of theafa 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.