I'm very sorry to read of this Jessie. I was under the impression however that IBD kills in a very short time period so "months later" might indicate it had nothing to do with that lady's visit to your home. Hard to say really.
It is a wake up call though to not allow just anyone to handle your collection. Mike and I made a determination a number of months back to close our BP room to visitors. While we might allow the very occasional person to hold a snake outside of the BP room, and will still do our school visits when we can, we no longer take just anyone in to see the ball pythons as we once would have done.