Sorry for the delayed response, busy with shows and babies.
It has been about 5 years since I lost my collection.
The only ones that showed symptoms before dying were 2 ball pythons, the boas just died.

The balls wouldn't move & would flip over on their back. When they started this, it was a matter of days before they expired. I had my male ball euthanized because I couldn't watch him die like I did the female. A necropsy was done and samples sent to the University of Florida (I think so, if not, somewhere in FL)
This all happened because of improper quarantine (fairly new keepers of more than one species of snake).