I dont' know if this will help, but have you done a Google search?
I many sites but picked the following as an example of some info............but you probably know all about it from experience.
http://www.poison-ivy.org/html/faq.htm
I've only seen once case and it was horrible looking! I'm from Hawaii, and although I have lived in the midwest, I still wouldn't know it if I sat next to it!
Get better soon.