IBD. Not treatable. Dead snakes evrywhere. I know of a few people who are great friends of mine that have lost a lot of snakes from poor QT.

Here is the reson you QT for mites. Say snake comes in, gets delivered and all of that. You open package set it up in new tub. Now you just took the snake in it's bag that it has been sitting in for quite a few hours to your other snakes right. You open the bags set them on a counter and put snakes in tubs and notice a few mites. Well how many of those mites are still on the bag and have now run off to not be seen? You just got mites in your entire collections and what if they are carriers of IBD? you just lost your entire collection from poor QT.

That is the reason for strict QT and a really good one IMO.