FIG. 4.

The alleles of bfpA identified in EPEC strains do not correlate precisely with the overall clonal lineage. Shown is a dendrogram of genetic relationships of EPEC strains from this study and representative DEC strains (79). The genetic distance was estimated in terms of electrophoretically detectable codon differences per enzyme locus for 20 enzymes. Previously identified DEC clusters (EPEC 1 and 2 and EHEC 1 and 2) are indicated (54, 78). Strain serotypes are in parentheses. Alleles of bfpA identified in specific EPEC strains are displayed in large, shaded type.