I'm just getting over a poison ivy outbreak... hate the stuff. It's harder to identify when its young, and I must have set my bag down in some because sure enough, 3 days later, poison ivy all over my lower back where my bag rests. Sent the bag through the washing machine to get it all out.
Careful with the washing machine. If not hot water, small trace amounts of oil can be left behind for the next load of clothes. This can transfer to small dots of ivy rash generalized anywhere clothing sits on the first wear.