Schistosomiasis Epidemiology and Control Strategies

Schistosomiasis remains a leading neglected tropical disease, with over 200 million people infected worldwide. Transmission hinges on contact with freshwater containing larval schistosomes released by infected Biomphalaria or Bulinus snails. The disease burden varies by region, species and local ecology, with urogenital infections predominating in Africa and intestinal forms in parts of South America and Asia. Control strategies have traditionally focused on mass drug administration of praziquantel to school-aged children and other at-risk groups. However, reliance on a single therapeutic has raised concerns about sustainability, potential drug resistance and incomplete interruption of transmission. Integrated approaches now emphasise snail control, environmental management, water, sanitation and hygiene (WASH) interventions alongside preventive chemotherapy. Advances in remote sensing and modelling have improved mapping of habitat suitability for intermediate hosts, enabling targeted snail-control measures. At the same time, molecular tools—from genome sequencing to single-cell transcriptomics—are shedding light on parasite development and host–pathogen interactions, opening avenues for novel interventions. Together, these developments underscore a shift from morbidity control towards interruption of transmission and eventual elimination, with strategies tailored to local ecological and social contexts.

Research from Nature Portfolio

In a pragmatic trial among Senegalese schoolchildren, an antimalarial combination of artesunate–mefloquine demonstrated non-inferior cure rates and acceptable safety compared with standard praziquantel, suggesting potential alternative or adjunct therapies to broaden the anti-schistosome armamentarium. Separately, machine-learning models combined with three decades of remote-sensing data have mapped shifts in Biomphalaria snail habitats across Brazil, revealing that climate change drives broad range shifts while urban expansion creates localised pockets of increased suitability. These insights inform precision snail-control programmes aligned with environmental change. Foundational genomic work on Biomphalaria glabrata has further identified snail genes involved in immune defences and stress responses, pinpointing targets for novel molluscicidal or biological control measures aimed at disrupting parasite development within the intermediate host.

Schistosomiasis Epidemiology and Control Strategies publication trend

The graph below shows the total number of articles in schistosomiasis epidemiology and control strategies across all publications each year (not limited to Nature Index journals).

Technical terms

Preventive chemotherapy: periodic administration of anti-schistosomal drugs to at-risk populations to reduce morbidity and transmission.

Mass drug administration (MDA): delivery of therapeutic drugs to entire at-risk populations irrespective of individual infection status.

Intermediate host: freshwater snails that harbour larval stages of Schistosoma parasites, critical for transmission.

Habitat suitability: environmental conditions that enable survival and reproduction of intermediate host snails.

Single-cell transcriptomics: high-resolution sequencing technique to profile gene expression in individual cells, revealing cell-type-specific functions.

References

1. Antimalarial artesunate–mefloquine versus praziquantel in African children with schistosomiasis: an open-label, randomized controlled trial. Nature Medicine (2024).
2. Climate and urbanization drive changes in the habitat suitability of Schistosoma mansoni competent snails in Brazil. Nature Communications (2024).
3. Whole genome analysis of a schistosomiasis-transmitting freshwater snail. Nature Communications (2017).
4. The retinoic acid family-like nuclear receptor SmRAR identified by single-cell transcriptomics of ovarian cells controls oocyte differentiation in Schistosoma mansoni. Nucleic Acids Research (2024).
5. Moving from control to elimination of schistosomiasis in sub-Saharan Africa: time to change and adapt strategies. Infectious Diseases of Poverty (2017).
6. The Relationship between Water, Sanitation and Schistosomiasis: A Systematic Review and Meta-analysis. PLOS Neglected Tropical Diseases (2014).