FIG. 2.

MLDF-based dendrogram obtained by the unweighted pair-group method of averages algorithm showing the genetic distances among invasive W135 strains isolated in 2001 (A) and 2002 (B) in France. Genetic distances were calculated on the basis of the amplified fragment length restriction polymorphisms of the pilA, pilD, crgA, regF, and iga genes. Each MLDF group was assigned an arbitrary number. The number of strains in each group as well as the phenotypes observed in each group is indicated. The corresponding sequence type was determined for the major MLDF group. Hajj strain-related phenotypes are underlined. ND, not determined.