We're having a real tick problem in my area. Dogs are coming down with Lyme disease in great numbers, according to a local vet. Of course, the pups go into the house, roll around on the sofa and end up sharing their ticks with humans. I did a little piece for my local paper urging people to take precautions including using tick repellent on pets and using 20% DEET repellent on themselves.
My sister came down with Lyme a few years ago and it was horrible.