I replaced a Fence in my back yard last weekend, and needed to clear/thin out some overgrown bushes etc. I didn't have any indication I had contacted anything until mid-week. I really only see it in 1 small area and have tried not to scratch it. I do get that itchy feeling though in many other places.
One time when I was about 10 I had it so bad on my hands (between fingers, etc.) that I had to soak them in this Brown stuff every day and none of the kids were allowed to play with me for weeks. It seemed I could get infected by just walking near the plants. But as an Adult contact hasn't been much of a issue, I'm sure I've touched it many times, but not too many skin eruptions.
The most annoying part is that it seems like I can feel it in my system. (or is that in my mind?)