https://en.wikipedia.org/wiki/Toxoplasma_gondii
"Once inside our bodies, T. gondii can infiltrate the central nervous system and influence neurotransmitters. The parasite has been linked to personality changes, the emergence of psychotic symptoms, and some neurological disorders, including schizophrenia."
Otherwise the data is not really great so far.
"This kind of research can't show cause and effect, and it often doesn't account for factors that may have affected both the exposure and the outcome.
The researchers also highlight the low quality of a number of the examined studies."
1) Most people with the Toxoplasmosis infection got it from eating undercooked meat, not from cats. France has the highest rate of toxoplasmosis in the world (50%+ of the population have the parasite) because of their propensity for rare meats: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1118145/
2) Unless your cat lived a significant part of it's life as an outdoor cat, it is very unlikely to have the parasite (like any parasite). Most cat to human transmission (again, minority of total transmissions) comes from stray cats infecting gardens with their feces.
Our review provides support for an association between cat ownership and schizophrenia-related disorders
Unless you know something I don't.
Cat parasite linked to mental illness, schizophrenia (19 points, 2023, 13 comments) https://news.ycombinator.com/item?id=38529342
Mind-Altering Cat Parasite Linked to Schizophrenia in Largest Study Yet (22 points, 2019, 3 comments) https://news.ycombinator.com/item?id=19040456
gus_massa•1h ago
So, it's not clear that cats make you schizophreanic, or schizofrenic people buys more cats.