Extended Data Fig. 4: Pairwise SNP distance distribution between isolates from outbreaks.

(A) Pairwise SNP distance distribution (bar, left Y-axis) between Foodborne Disease Outbreak Surveillance (FDOS)-outbreak isolates of different pathogenic clonal group (PCGs), and the proportion of clustered isolates under different SNP cutoffs (lines and points, right Y-axis). Blue and red indicate all the SNPs and non-recombined SNPs, respectively. (B) Pairwise SNP distance distribution between 34 isolates from four outbreaks of external independent datasets.