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I recently submitted a link to a new research paper suggesting that Alzheimer's disease might be associated with fungus. Existing research and other writings already support the association of Parkinson's disease with fungus, see below.
http://www.ncbi.nlm.nih.gov/pubmed/17051898
Acetaldehyde is a toxin produced by fungus. The abstract for the above-linked study from 2006 states that, "In the presence of acetaldehyde, dopamine is converted into salsolinol, a neurotoxin involved in apoptosis of dopaminergic neurons."
In other words, fungus produces a toxin which combines with dopamine to make a neurotoxin, which then causes the dopamine-making neurons to self-destruct (apoptosis is programmed cell death). The loss of most of the dopamine-making neurons in the brain's substantia nigra causes dopamine levels to drop drastically, causing parkinsonian symptoms.
http://www.jns-journal.com/article/S0022-510X(13)00865-4/abstract
Fungal volatile organic compounds: Biogenic toxins as etiological agents for Parkinson's disease
Parkinsonism secondary to bilateral striatal fungal abscesses
The book, Road to Recovery by Richard Rodgers, discusses the author's belief that Parkinson's is caused by a fungal infection. This topic is addressed on page 106. You can read that page by following the above Google Books link.
http://www.ncbi.nlm.nih.gov/pubmed/17051898
Chronic polysystemic candidiasis as a possible contributor to onset of idiopathic Parkinson's disease.
http://www.vrp.com/digestive-health/a-health-destroying-toxin-we-cant-avoid-and-must-detoxify
A Health-Destroying Toxin We Can't Avoid And Must Detoxify
Article is written by a Clinical Laboratory Scientist--see paragraph titled Detrimental Effects.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3689266/
Acetaldehyde and parkinsonism: role of CYP450 2E1
In the paragraph titled Acetaldehyde and Parkinson's Disease, they don't mention the fact that acetaldehyde can be produced by fungus; they relate it to alcohol consumption, which is another reason for acetaldehyde to be present in the body.
http://www.ojs.ukw.edu.pl/index.php/johs/article/view/2015;5(3):68-78
Fungal infection possible pathogenic role in Parkinson disease and parkinsonism
This 2015 journal article published in Poland by researchers at Odessa National Medical University in Ukraine is written in the Russian language, but the abstract is translated into English.
https://www.google.com/patents/US6652866
Method for treating diseases of fungal, yeast, and prion protein etiology
This veterinarian believes that many neurodegenerative disorders are caused by fungi. He has developed a method of treating symptoms of the disorders by administering anti-fungal fatty acids, as explained in his patent application.
