Table 2:
Geographic distribution of tick-borne pathogens and their vectors in Canada2
| Organism (tick-borne illness) | Principal tick vector | Geographic distribution in Canada |
|---|---|---|
| Anaplasma phagocytophilum (anaplasmosis) | Ixodes scapularis, Ixodes pacificus | BC, AB, SK, MB, ON, QC, NB, NL, NS, PEI |
| Babesia microti (babesiosis) | Ixodes scapularis | MB, ON, QC, NB, NS |
| Borrelia burgdorferi (Lyme disease) | Ixodes scapularis, Ixodes pacificus | BC, AB, SK, MB, ON, QC, NB, NS, NL, PEI |
| Borrelia hermsii (tick-borne relapsing fever) | Ornithodoros hermsi | BC |
| Borrelia mayonii (Lyme disease) | Ixodes scapularis, Ixodes angustus | ON, BC |
| Borrelia miyamotoi (tick-borne relapsing fever) | Ixodes scapularis, Ixodes pacificus | BC, AB, MB, ON, QC, NB, NS, NL, PEI |
| Colorado tick fever virus | Dermacentor andersoni | SK, AB |
| Ehrlichia chaffeensis or Ehrlichia ewingii (ehrlichiosis) | Amblyomma americanum | Not reported in Canada |
| Francisella tularensis (tularemia) | Dermacentor variabilis, Dermacentor andersoni, Amblyomma americaum | BC, AB, SK, MB, ON, QC, NB, NS, NL, PEI |
| Powassan virus (Powassan encephalitis) | Ixodes scapularis, Ixodes marxi, Ixodes cookie, Ixodes spinipalpis, Dermacentor andersoni | ON, QC, NB, PEI, MB, NS |
| Rickettsia rickettsia (Rocky Mountain spotted fever) | Dermacentor variabilis, Dermacentor andersoni, Rhipicephalus sanguineus | BC, AB, SK, ON, NS |
Note: BC = British Columbia, AB = Alberta, SK = Saskatchewan, MB = Manitoba, ON = Ontario, QC = Quebec, NB = New Brunswick, NL = Newfoundland and Labrador, NS = Nova Scotia, PEI = Prince Edward Island.