I've never heard of Myco? I looked it up when I read the post and I'm not sure about it.. :\
I didn't play close enough attention to them to really see. They do make a gurgle sound and do what I'm assuming is sneezing. I gave 2 of my rats away because my girlfriend named them and wouldn't let me feed them. They were taken in by a local rat rescue. The woman who runs it said they had URI's but who knows :\. The one I got today was from a different source and it was showing similar symptoms.. Can Myco effect the snake?