Another exemplary paper of why you need to beware of reversed causality. Since infection with T. Gondii is much more likely if you are less cautious with food and animals, it is very much possible that the causal link is actually reversed. It's also worth pointing out that current research has cast major doubt on the old idea that toxoplasmosis causes any psychological effects in humans [1]. While it might sound cool…
> current research has cast major doubt on the old idea that toxoplasmosis causes any psychological effects in humans Asking non-jokingly, how do we explain “cat ladies”? Women who hoard cats and seem to be crazy. They’re not typically “hamster ladies” or “dog men”. Sure with billions of people you’ll find examples of anything. But “cat ladies” seems to be an obvious symptom of something.
It's a book/holywood cliché