I have an avoidance mechanism that sets in when they start grouping schizophrenia with Parkinson's. I wonder why that is?

This is wildly new to me:
"….dopamine is the “missing link between schizophrenia and toxoplamosis,” ……Decreased level of psychobiological factor novelty seeking and lower intelligence in men latently infected with the protozoan parasite.."

"…This finding suggests the possibility that the excess dopamine thought to occur in individuals with schizophrenia might be being introduced by T. gondii rather than made by the affected individuals…"

What a list!:::
...parasites, cat feces, dopamine, PD, Schizo, lowering of intelligence in men...

actually it's the parasites from cat feces that freak me out. I don't like the idea of parasites. The rest of that list, well, it seems familiar to me... for some reason..