Global Parasite May Be Shaping Human Cognition

Toxoplasma gondii infects roughly one-third of people worldwide through cat feces, undercooked meat, contaminated water, and from mother to fetus. While often mild, the parasite can alter brain chemistry and behavior and has been linked to cognitive changes and an increased risk of schizophrenia. There is no vaccine or cure, and researchers argue for recognizing toxoplasmosis as a neglected tropical disease to mobilize resources, address its significant health and economic burden, and target especially vulnerable populations in poorer regions.