It's not just Lyme disease that's expected to increase in Canada as ticks spread. Experts say the tick-borne diseases babesiosis and anaplasmosis are becoming more common too.

Lyme, once considered an isolated disease found in North America and parts of Europe, is now found in 80 countries worldwide.

The summertime spread of Lyme disease has given rise to extra caution about ticks and the roving birds and mice carrying the illness. But a new study suggests we put just as much focus on another animal. After observing human Lyme disease cases in a Connecticut community over a 13-year period, authors of a Journal of...