Mayo Clinic testing is through Western Bloc and elsie test and these are a total joke. I'm 72 also And I've been Fighting this battle for a long time thank God medicare pays for Igenix and I went with their high end test which was like $3600 medicare paid for it this one really showed all the co infections. just remember when your immune system starts to drop off, you don't produce antibodies at least this is what I'm told by my doctor. My one friend she has bumps all over her body which are very sensitive to touch turns out it was babesia. I'm not saying You have this or these coinfections but why not get tested it's not going to cost you anything that's if you have Medicare. My infectious disease doctor says that there's over 800,000 people walking around with Lyme disease and co-infections and have no clue they have it insurance companies don't want to know it And neither does the pharmaceuticals because they're not making any money from it right now. most of your lime doctors charge cash no insurance what a joke. Good luck in your quest to find the answers I know I'm still fighting.