FIG. 2.

Dendrogram showing relationship between FAFLP genotypes and prevalent HS serotypes of C. jejuni. The dendrogram was derived from FAFLP data by UPGMA and the PHYLIP and TreeView programs (21). The HS serotype of each strain is shown in boldface type following the strain number (see Table 1). Following cluster analysis, FAFLP genotypes were designated as clusters A-1 to A-6 and clusters B to H or as unclustered genotypes, shown in italics (UG1 to UG11). The isolates in all 13 of the clusters showed ≤10% divergence. The dotted line delineates cluster A complex isolates that are serologically related (8), and the isolates within this complex exhibited ≤25% divergence. Within this cluster complex, six genotypic clusters were designated A-1 to A-6 (shown in italics), and two isolates with unique genotypes were designated A-UG (see Results). An asterisk indicates a C. coli strain which was untypeable by both sero- and phage-typing and exhibited genotype UG11.