Figure 4
From: Pilus distribution among lineages of group b streptococcus: an evolutionary and clinical perspective
Frequency of pilus island (PI) backbone protein genes by clonal complex (CC). The distribution of A) six gbs59 alleles specific for PI-2a is illustrated in 161 group B streptococcal strains and B) three san1519 alleles specific for PI-2b in 113 strains belonging to the seven CCs. In each figure, the CCs are listed in tree order based on the Neighbor-Joining phylogeny (Figure 1). Singletons (n = 21) were excluded from this analysis.