Okay - thanks, Erin. They are now staying for their second night here, so it's too late to worry about it now. I did my best and so did she to avoid any contamination so all I can do is hope that we don't get them.
When she came over, she handed me a Target bag filled with stuff and I took it directly to the outside dryer and threw it in. Turns out it was EVERYTHING she had including toiletries, books, etc. I ended up accidentally melting her deodorant. 
Nothing I can do now but wait to see I guess. I hope that if I ever have something difficult like that happen to me that someone will be kind and help me out too. If something bad happens then something bad happens and I will just deal with it then.
"Any idiot can face a crisis; it is this day-to-day living that wears you out." -Anton Chekhov