Doesn't it seem like every other month, depending on latest research that PD is a mitochondrial disease, then a channelopathy, and now latest is prion. It seems like there should be criteria for classifying diseases, so I have no idea how it's done. Maybe they haven't settled on just "one" for PD because there are so many different pathways to disease. It seems as if we all end up with mutant proteins then it should be prion. Anyway, I ran across this person's theory and he sees the main cause of PD as a fungal infection. I am not going to pass judgment on him; if you read the comments enough have done that. However, I was intrigued by his approach to classifying and seeking etiology. I tend to agree with his view of how modern science has bungled this for us.
MedKB (Medical Knowledge Base)