Figure 1

Established populations in Canada and the United States from where I. scapularis were collected, and the relative abundance of different 16S haplotypes within each population. Green triangles represent populations in the western geographical region: 1) Pembina Valley Provincial Park, 2) Stanley Trail, 3) Itasca State Park, 4) Camp Ripley, and 5) St. Croix State Park, while orange triangles tick populations in the eastern geographical region: 6) Point Pelee National Park, 7) Long Point Provincial Park, 8) Trustom Pond, South Kingstown, and 9) Hazard Island, South Kingstown.