I have wondered about this many times. I never had toxoplasmosis, but I have had cats all my life. I still have one. It seems to me that LOTS of the members here have cats. Arti has no cats, but Arti hates cats, so I wondered if he'd been around too many as a child? (Am I right, Arti?)
When I did a questionairre for Accelerated Cure Project, they asked about pets. That's probably what made me wonder about it.