Fig. 3.—

Correlations of SNP distances and geographical or temporal distances among the Lineage I strains. Pair-wise SNP distances and geographical and temporal distances among the Lineage I strains were determined, and the correlations of SNP distances and geographical (left panel) or temporal (right panel) distances were investigated. Lineage I contains two sets of strains (HH-12/13 and HH-16/17/19) that were isolated from ticks that were collected in the same location on the same day. As no SNPs were found in each set of strains, only one strain from each set was included in this analysis. Pearson’s correlation coefficients were calculated using the R package.