Silent Cognitive Parasite Infected Billions Worldwide

WHO:

Futurism - Justine Smith, ophthalmologist at Flinders University, is a co-author of the study on toxoplasmosis.

WHAT:

Futurism - Toxoplasma gondii is a single-cell organism that primarily spreads to humans via cat feces, raw or undercooked meat, contaminated water, and from mother to fetus.

Futurism - Approximately one-third of humanity, or roughly two billion people, is estimated to be infected with toxoplasmosis, including about 60 million people in the United States.

Futurism - Toxoplasmosis is described as “one of the most common parasitic infectious diseases affecting humans” and the number one “intraocular infection” globally.

Futurism - The study indicates that there is currently no cure for toxoplasmosis, and existing drugs can only limit flare-ups of the disease.

WHERE:

Futurism - The study discusses the impact of toxoplasmosis particularly in the global south, where poor populations are more susceptible to parasitic infections.

WHY:

Futurism - The researchers argue that recognizing toxoplasmosis as a neglected tropical disease would free up resources for further studies and public health policy development to address its burden on human health.

Futurism - The paper states that infants who survive congenital infection face lifelong health consequences, contributing to a poverty trap for families already facing socioeconomic vulnerability.

HOW:

Futurism - The infection is spread through various means, including cat feces, undercooked meat, contaminated water, and maternal transmission to the fetus.

(UPDATED June 29, 2026 04:21 UTC)

A new study co-authored by Justine Smith, an ophthalmologist at Flinders University, highlights the widespread impact of toxoplasmosis, a parasitic infection affecting roughly two billion people worldwide, including about 60 million in the United States. Toxoplasma gondii, the organism responsible for this disease, spreads through cat feces, undercooked meat, contaminated water, and maternal transmission, and currently, there is no cure, with existing treatments only able to manage flare-ups. The researchers emphasize that recognizing toxoplasmosis as a neglected tropical disease could lead to better resource allocation for research and public health initiatives, particularly in vulnerable populations in the global south, where the infection poses significant health risks and contributes to cycles of poverty.