Our area in central Alberta just east of the Rockies was flea-free. They have spread north (or east from B. C.?) and now are within 25 miles of Calgary. Vets here are waiting and hoping for the bonanza in powders and sprays that they will bring when they get into the City.
Nematodes- Gardens here were free of them, but they have come in as well, probably in balled or potted plants. They destroy some plants by eating hair roots, etc. and we try to eliminate them.