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Cercarial Transformation and in vitro Cultivation of Schistosoma mansoni Schistosomules
Published on: August 16, 2011
Putting the treatment of paediatric schistosomiasis into context
Takafira Mduluza1,2, Francisca Mutapi3
1Biochemistry Department, University of Zimbabwe, P.O. Box MP167, Mount Pleasant, Harare, Zimbabwe. tmduluza@yahoo.com.
Insights
Developing a child-friendly praziquantel formulation is crucial for controlling schistosomiasis in preschool-aged children. Current praziquantel tablets are difficult for young children to swallow, necessitating new formulations.
Area of Science:
- Neglected Tropical Diseases
- Parasitology
- Paediatric Pharmacology
Background:
- Schistosomiasis control relies on mass drug administration, primarily targeting school-aged children.
- Preschool-aged children were historically excluded but are now recognized as a key population for treatment.
- The World Health Organization recommended including preschool-aged children in treatment programs in 2010.
Purpose of the Study:
- To address the challenge of treating preschool-aged children with schistosomiasis.
- To highlight the need for a child-appropriate praziquantel formulation.
- To discuss the target product profile for paediatric praziquantel.
Main Methods:
- Review of current praziquantel formulations and their limitations for paediatric use.
- Analysis of evidence supporting the inclusion of preschool-aged children in mass drug administration.
- Discussion of knowledge gaps in paediatric schistosomiasis control.
Main Results:
- Current praziquantel tablets (600 mg) are not suitable for young children due to size, palatability, and dosing inflexibility.
- Breaking or crushing tablets poses risks and affects accurate dosing.
- A child-appropriate formulation is urgently needed.
Conclusions:
- Effective schistosomiasis control requires tailored praziquantel formulations for preschool-aged children.
- Development of paediatric praziquantel is essential to improve treatment accessibility and efficacy.
- Further research is needed to define optimal paediatric praziquantel product profiles.
Abstract:
Despite increased international efforts to control schistosomiasis using preventive chemotherapy, several challenges still exist in reaching the target populations. Until recently, preschool-aged children had been excluded from the recommended target population for mass drug administration, i.e. primary school children aged 6-15 years. Our studies and those of others provided the evidence base for the need to treat preschool-aged children that led to recommendations by the World Health Organization to include preschool-aged children in treatment programmes in 2010. The major challenge now lies in the unavailability of a child-size formulation of the appropriate anthelmintic drug, praziquantel.The currently available formulation of praziquantel presents several problems. First, it is a large tablet, making it difficult for young children and infants to swallow it and thus requires its breaking/crushing to allow for safe uptake. Second, it is bitter so it is often mixed with a sweetener to make it palatable for young children. Third, the current formulation of 600 mg does not allow for flexible dose adjustments for this age group. Thus, there is a need to formulate a child-appropriate praziquantel tablet.This paper discusses the target product profile for paediatric praziquantel, as well as knowledge gaps pertinent to the successful control of schistosome infection and disease in preschool-aged children.
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