Got this after wandering into the bushes on an evening walk.  Total time on walk when this happened...10 minutes.  Lasting effects...4 weeks.  Number of doctors who said this was the worst case they ever saw...4.  I have some good scarring as well.  This picture is of my leg one week after I came in contact with poison ivy.  It turns out I have a very bad systemic reaction.  It certainly complicated the house boat vacation we were on.