I remember reading about it someplace as a generic term used for a disease specific to snakes. Maybe I'm wrong. Thanks
:With a lot of different causes. That it could be caused by anything that affects the nervous system. Unless there's something specific to vipers that I missed. I have a 'stargazing' sand boa that I think just has some sort of chronic neurological issue- whatever it is, he hasn't passed it on to his cagemate. He's sort of funny to watch.