Yikes! ! All 17 snakes.

To start off with you need to create some sort of safe haven . So disinfect a rack/set of cages from top down . Use bleach or something strong and be sure to give it lots of time to dry and air out. I would personally move this to another room after if possible. The problem being that mites move fast.

Then the process of treating each snake and moving them over to the enclosure that has already been treated. I've heard of various products working, like frontline etc. Spray a little on a towel or clothe of sorts and let the snake slither through. Make sure to avoid the head! Also do not provide a water bowl in the enclosure for a short time frame after treating the snake. You want to avoid the snake soaking and/or possibly ingesting any of the mite treatment.

You may have to do this a few times unfortunately.

I have never experienced this before so I'm speaking from what I've read. Anyone is welcome to correct me if and where i be incorrect.

Good luck and I hope you get the little pests!