FIG 1.

Minimum spanning tree analysis, using BioNumerics version 7.1, of the 324 Kingella kingae isolates based on allelic profiles of 6 housekeeping genes. Each circle corresponds to a sequence type (ST). The ST number is given beside the circle, and the size of the circle is related to the number of isolates found with that profile (from 1 for small circles [e.g., ST-1] to 60 [e.g., ST-6]). Each color inside the circles represents the geographical origin of the strains (green, Israel; red, France; orange, Spain; khaki, Canada; pink, Iceland; blue, Norway; yellow, United States; purple, Australia; and turquoise, Russia). Gray zones between some groups of circles indicate that these profiles belong to the same ST complex. Width of the line joining two STs indicates the number of alleles differing. *, One strain of the ST was responsible for an outbreak of K. kingae invasive infections at a daycare center in the country related to the colored background.