R.H.
I would think you would want a pathologist. But I wanted to mention that while I was in high school a boy I knew contracted meningitis as well, I believe bacterial, and when he was finally back, his personality had changed drastically. People said he was a different person and we were told it was a result of the meningitis. I know this may not be what you want to hear but I at least wanted you to know that it may not be abnormal for something like that to happen. Good Luck to you both and I hope he makes a full recovery.