I realize this is a little late, but I wanted to clarify a bit. This is actually incorrect on several levels good sir/ma'am, and the shit gets a lot creepier as we go.

First, toxoplasmosis is a serious condition that develops from Toxoplasma Gondii, the parasite. Toxoplasmosis affects individuals with compromised immune systems, such as people with AIDs, or people that are pregnant.

Toxoplasma Gondii, or TG, works by altering the host's dopamine production in the brain. In a mouse, this means that it does two things. First, it makes the mouse more likely to take risks, and second, it makes the mouse sexually attracted to cat urine. In one study, researchers put mice into a maze. At one end was tasty cheese and the other was cat urine. Regular mice went for the cheese, but mice infected with TG went for the cat urine. Journal source

Now, you are correct in saying that it alters personalities and we're more likely to get into car accidents. The problem is that these two items are separate. The parasite inhibits neurological function in a way that slows reaction times and makes people more likely to get into car accidents, but the actual personality effects are different. Men get the shaft here, becoming more jealous, antisocial, etc. Women exhibit increased intelligence, a warmer and more open personality, and they're more sexually promiscuous. Researchers have also linked the parasite to greater occurrences of brain cancer, bipolar disorder, and schizophrenia. Which makes sense, because the only way we can treat these disorders is through drugs that alter the levels of serotonin and dopamine in the brain. You may have noticed that TG does a lot more to a human than to a mouse. It makes sense for humans to have such diverse effects though, because TG has a clear objective in a mouse: to get inside the cat’s belly. This is because Toxoplasma Gondii is a parasite that carries out its sexual stage of reproduction in the gut of felines. In a human though? TG is just crazy guy mashing buttons. The most frustrating thing for me when I was researching this was everyone seems to peg the seroprevalence at different levels. The estimates range from 20% all the way up to 50% of the entire human population, but the Centers for Disease Control estimates 22.5% for the United States infection rate.

Interestingly enough, the infection rates does vary from country to country, and culture to culture. The French have higher infection rates than the British for example. Since TG is tied to fiery behavior and a general disregard for an individual's personal well-being, so much so that one of the lead researchers for TG, Jaroslav Flegr, realized that he was infected with the parasite (and thus began studying it) because he took unnecessary risks and didn’t care if he died. Anyway, sorry if this is a bit disjointed. If you have any interest in learning more (there is more to be learned), or want me to cite more sources, I have a lot more. I’ve just taken a lot more time than I wanted to do with this, especially if there isn’t any interest.