Not related to a pathogen, but there have been studies in seeing if untackled celiac disease causes dementia through inflammation: https://www.sheffield.ac.uk/n

Not related to a pathogen, but there have been studies in seeing if untackled celiac disease causes dementia through inflammation: https://www.sheffield.ac.uk/news/nr/sheffield-coeliac-disease-brain-damage-1.882611 https://www.sheffield.ac.uk/news/nr/sheffield-coeliac-diseas... I have a personal interest in this as my dad had celiac disease, refused to obey the diet, then within a few years had vascular dementia, cerebral amyloid angiopathy, and three strokes! Inflammation -> brain problems feels like a natural connection to me whether through pathogen or immune reaction.