An Open Label Dose Finding Safety and Efficacy in Children and Infants Infected With Schistosomiasis (S.Mansoni)

Inclusion criteria

• Male and female children aged 2 to 6 years (Part 1) and 3 to 24 months (Part 2)
• S. mansoni positive diagnosis defined as positive egg counts in stool (greater than [>]1 egg/1 occasion) according to World Health Organization (WHO) classification : light (1-99 eggs per gram of faeces), moderate (100-399 eggs per gram of faeces) and heavy (greater than or equal to [>=]400 eggs per gram of faeces) infections
• Minimum weight of 8.0 kg in 2- to 6-year-old children and of 4.0 kg in 3- to 24-month infants

• Parents/legal representative ability to communicate well with the Investigator, to understand the protocol requirements and restrictions, and willing their children to comply with the requirements of the entire trial, i.e.
• To be examined by a study physician at screening and 14-21 days after treatment
• To provide stool and urine samples at screening, 24 hours and 8 days after treatment, as well as 14-21 days after treatment
• To provide finger prick blood samples for Pharmacokinetics (PK) studies and blood samples for safety assessments

Exclusion criteria

• Treatment in the 4 weeks prior to study screening with Praziquantel (PZQ) , other anti-helminthic, antimalarial or anti-retroviral compounds or any other medication that might affect the PK of PZQ such as certain antiepileptics (e.g., carbamazepine or phenytoin), glucocorticosteroids (e.g., dexamethasone), chloroquine, rifampicin or cimetidine
• For children being breast fed, treatment of the mothers/wet nurses with PZQ in the 3 days prior to administration of Investigational medicinal product
• Previous history of adverse reactions associated with PZQ treatment
• Marked increases of the liver transaminases (alanine aminotransferase and/or aspartate aminotransferase) above 3x Upper Limit of Normal (ULN)
• History of acute or severe chronic disease including hepato-splenic schistosomiasis
• Fever defined as temperature above 38.0 degree centigrade
• Debilitating illnesses such as tuberculosis, malnutrition, etc. as well as a medical history of seizures
• Mixed S. haematobium and S. mansoni infections
• Findings in the clinical examination of schistosome-infected children participating in the study as performed by the study clinician on the treatment day, that in the opinion of the Investigator constitutes a risk or a contraindication for the participation of the subject in the study or that could interfere with the study objectives, conduct or evaluation
• Unlikelihood to comply with the protocol requirements, instructions and trial-related restrictions, e.g., uncooperative attitude, inability to return for follow-up visits, and improbability of completing the trial