Toxoplasmosis: Epidemiological Significance, Economic Burden, and Emerging Directions in Drug Discovery and...

Toxoplasmosis, a parasitic disease caused by Toxoplasma gondii, affects a wide range of warm-blooded hosts and remains most prevalent in tropical regions, with distribution shaped by climate, cultural practices, and environmental conditions. Clinical severity varies across susceptible populations, generating substantial economic burdens through medical costs and agricultural losses. Given this global health impact, a comprehensive, up-to-date understanding of the disease is essential. However, significant gaps persist. While diagnostic techniques and epidemiological surveillance have advanced considerably, treatment protocols have remained largely unchanged for decades, revealing a disconnect between diagnostic innovation and therapeutic progress. Moreover, existing literature lacks an integrative synthesis connecting these advances to their broader significance, leaving researchers without a unified framework for understanding where the field stands and where it should go next. To address these gaps, this narrative review draws on peer-reviewed literature and institutional reports across major biomedical databases, synthesizing findings descriptively and thematically rather than through statistical meta-analysis. It critically examines toxoplasmosis across several dimensions. It first considers geographical distribution and the cultural, environmental, and economic factors shaping its epidemiology. It then turns to the parasite's biochemical and molecular characteristics, using this foundation to evaluate persistent limitations in treatment and vaccine development, an area where progress has stalled. In response, the review explores emerging alternatives, including plant-based compounds, as avenues beyond conventional pharmacological strategies. Finally, it examines artificial intelligence as an underexplored but promising tool for improving diagnosis and treatment, an area with limited application to toxoplasmosis specifically. By consolidating these threads, this review clarifies not only what is known about toxoplasmosis but also where critical gaps in treatment innovation and integrative understanding continue to hinder effective prevention and control.