From your link:
“Predicting future trends in T. gondii prevalence in the United States is difficult because we do not have a national estimate of what proportion of T. gondii infections are attributable to undercooked meat exposure or to cat feces, soil, or water exposure. A large European case-control study that examined these factors showed that undercooked meat accounted for the largest portion of risk for T. gondii infection”
I understand one of the symptoms is a pathological hatred of motorcycle clubs.