Funny you should say that.. I had mites once.. well my friends living room did.. and I was in the living room. Bird mites really itch!
I haven't had any snake with a RI. The last snake I got I thought for sure it would have one but it never had any symptoms. I still worry about it because it doesn't stick its tongue out very far but it doesn't have any other issues so I think he just has a short tongue