Figure 2.

Spatial cluster analysis of 55 haplotypes of mtDNA Cox1 sequences from Ixodes scapularis (see Mechai et al., 2013 for details) and MLST sequence types of B. burgdorferi within these ticks collected in passive surveillance in southern Canada. Three significant clusters of Cox1 haplotypes were identified respectively in south and south-western Quebec and Southern Ontario (red circles). One small-scale cluster of one B. burgdorferi ST (ST-01) was also found in south eastern Ontario (hatched circle). Because this ST has been found previously in the northeastern US, and because of the small radius of the cluster, this cluster likely represents a founder event.