http://onlinelibrary.wiley.com/doi/1...tb01228.x/full
I just googled this topic and have to say there isn't a lot of information on it affecting snakes, although it does happen apparently. One site indicated that it can only be transmitted from one animal to another by eating the feces of the affected animal, but then in the next sentence said is was highly infectious. Yes VIRUSES are infectious but transmission through ingesting feces sounds like what I'd expect for intestinal parasites, and it's not like snakes would walk or crawl through feces and then groom themselves and lick it off!!
I'm not even clear on this point if the adv virus present in Beardies, is the same strain that is found in snakes. If they are two different strains, you may be fine. I sympathize as I know you must be worried sick.... keeping my fingers crossed that your snake remains healthy. The only thing I might suggest is that you try to keep your animal healthy, well fed, and free from stress as viruses don't respond to anibiotics, it's the immune system which eventually eliminates them.... or not. Making sure your snakes' immune system is strong and effective is the most effective way to deal with this.
Wishing you the best of luck!![]()