skipinnz:

No I have both! Poison ivy has grown in a certain section of my garden and we've had it killed last summer by experts. But it is so tenacious that it came back again this spring and even though I didn't see it, it saw me. I have the rash on my hands my thighs and my neck.
I think that the more you get it the worse it is every time. That's my homegrown theory, anyway.