I'm sorry to hear of your loss virginiana. You did well with the quarantine period and it's unfortunate this one slipped by. Hopefully it isn't contagious, but I'd recommend a necropsy to assess the level of concern for your other snakes. If this isn't possible, place your entire collection on a 90 day quarantine... no new animals in, none out. Separate all enclosures with separate tongs (or soak them in bleach, wash, rinse inbetween) in case some have received a disease and others have not. Do a round of fecals to see if anything has popped up. And of course observe your animals for anything abnormal.

I hope all goes well!

Ian