@farmerman,
Yep, paralysis ticks are a huge issue where I am. The local vet even keeps a running list in the foyer of cases treated monthly so you can see when it's peaking (usually early dry season) and be doubly vision.
Both our dogs have had them - but we noticed the symptoms pretty quickly and each only had to overnight while they got the serum.
The older dog got a second one on her eyelid a couple of years ago, had to have her sewn shut while she healed but she's still going strong (17 next birthday!).
The ticks excrete into the blood stream of the animal they're taking the blood from - the symptoms are pretty dramatic, in 24 hours you'll notice your dog bump into things, throw up yellow bile, lose appettite, then start losing control of rear legs (we've never got to that last one but I've heard lots of other people have).
I have heard of one human getting one - but from memory the symptoms weren't quite the same.