FIG. 1.

Macrorestriction dendrograms and ST information for selected serotypes. Serotypes 1, 3, 4, and 6A are shown. The serotype is indicated at the upper left corner of each dendrogram. Dice coefficient values (percentages) are indicated in the scale above each dendrogram. Whenever ≥2 isolates had a macrorestriction pattern with a Dice coefficient of 100%, a single pattern is shown in the figure, and a triangle proportional to the number of isolates is indicated in the dendrogram. The number beside the triangle indicates the number of isolates with the same profile. All STs determined for isolates of each serotype are indicated in bold type, and the number in parentheses indicates the number of isolates with the same macrorestriction profile and exhibiting that ST. Nonsusceptibility to various antimicrobial agents is indicated by superscripts as follows: R, resistance; I, intermediate; CHL, chloramphenicol; CLI, clindamycin; ERY, erythromycin; LVX, levofloxacin; PEN, penicillin; SXT, trimethoprim-sulfamethoxazole; and TET, tetracycline. Whenever ≥2 isolates had the same macrorestriction profile, the different antimicrobial resistance profiles are indicated in parentheses followed by the number of isolates with each profile.