Leptospirosis and syphillis are also spirochetes. The lady that does this in the biological dentist's office, told me that she's been doing this since the late 1970's. They are found often in the plaque of patient's, as the one report indicated.
You can watch videos of the spirochetes wiggling their way into a blood cell, and blowing the blood cell up- then wiggling their way to another blood cell and corkscrewing it's way into it. If spirochetes are in the mouth- they are all through the body, including the brain.
Lots of information on the internet with the words "brain spirochete".