"Back in 2012, The Atlantic ran a profile piece called "How your cat is making you crazy," that outlined the research of Jaroslav Flegr, an evolutionary biologist at Charles University in the Czech Republic, who told journalist Kathleen McAuliffe that, "Toxoplasma might even kill as many people as malaria, or at least a million people a year."
"[The] 'latent' parasite may be quietly tweaking the connections between our neurons, changing our response to frightening situations, our trust in others, how outgoing we are, and even our preference for certain scents," McAuliffe summarised his hypothesis. "And that’s not all. [Flegr] also believes that the organism contributes to car crashes, suicides, and mental disorders such as schizophrenia."
I am a felinophobe so I am inclined to believe that Czech biologist as I had the dubious pleasure of being exposed to some felinophiles' erratic behaviour.at numerous occasions.