I'm not going to get into the whole debate on whether or not your snake truly had IBD. If you and your vet truly believe it did, you should avoid bringing any other boids or boas into your home for at least a year to avoid spreading the disease to them. That's why I would have had a necropsy done on the snake, so I'd know whether I had to self-QT for the next 12 months.
I'm very sorry for your loss.