The article described something specific that could be tested. I leave it to the scientist to design a similarly specific experiment for humans. Also the "reckless" behaviour exhibited by the cubs disappeared after there were older than 1 year:

While uninfected cubs stayed an average of 300 feet away from lions, cubs that had Toxoplasma antibodies in their blood had ventured within an average of 142 feet from the predators, a dangerous proximity. These differences disappeared after the cubs turned one, perhaps because the survivors learned not to get too close to the felines.