Fig. 2

Correlation between clone complexes (CCs), sequence type (ST) and serotypes of invasive group B Streptococcus isolates. In the minimum spanning tree, the STs are displayed as circles. The size of each circle indicates the number of isolates of that particular ST, with each colour represents a different serotype. The founder ST was defined as the ST with the greatest number of single-locus variants. The major clonal complexes (CCs) are indicated in the diagram. The colours of the halo surrounding the STs denote types that belong to the same CC. STs that vary by one allele in their multilocus sequence typing profiles (single locus variants) are arranged in circles around the primary founder sequence type. The numbers on the lines represent the number of locus variants. ST17 was the most frequent ST among 15 STs identified. Most of GBS isolates were found within five clonal complexes (CCs): CC17, CC10, CC19, CC23, and CC1, with CC17 being the most common