Phylogenetic analysis based on aCGH and MLST. (a) aCGH clustering of Bt isolates. Clusters were based on whole-genome microarray data. Six distinct clusters are observed, with cluster 1 containing both Bp-likeCPS-expressing strains. Strains are color-coded by the sequence types (STs), also shown in brackets. (b) MLST network reconstruction of Bt genotypes. MLST clustering was performed on 21 STs, 18 of which are shared with the aCGH data. 18 genotypes are represented by a highly reticulate network at the left of the figure, while three genotypes (ST73, ST101 and ST696) segregate as a distinct phylogenetic clade.