My husband also had a diagnosis, not as the result of a blood test, but from the typical bullseye rash. He, however, was told "don't worry about lyme, people overact" and was not offered antibiotics until much later. Now, PD, and I agree, as he has a good response to parkinson's meds. I often wonder about the initial infection as the cause, though.

I later also had the rash, but was given antibiotics very quickly. I still initially had some neuological symptoms that went slowly away. We do live in an area where tick bites are very common. We have had one neighbor die from ALS, several diagnosed with MS. several with neuropathy, several with arthritis. Brother-in-law is still struggling with problems related to his diagnosis. Probably back to blood barrier, or some such. Husband still does some better when given strong antibiotics, though it is not permanent.

I say all this, not arguing about the PD diagnosis, but as a theory as to "why."