That doesn't mean anything at all, this is ibd we're talking about here. May not show signs for 6 months, spreads inevitably fast, and whipes out entire collections.
For the record, the only time ibd has ever been in my house was a boa from petco back in 2005. Luckily i didn't exactly have a collection to speak of at the time. That shit will spread via hands, clothes, feeding utensils,, tubs,, some say it may even be airbourne