Active clinical trials for "Schistosomiasis haematobia"

Previous clinical trials have already demonstrated the safety of the candidate vaccine in adults as well as in children, in good health or infected with schistosomiasis. Regarding the induced immune response, more than 80% of vaccinated subjects were seroconverted after three vaccine injections. The induced immune response was substantial but transient. In order to obtain a more lasting immune response, the investigator will experiment with a new vaccination schedule (2 injections 1-month interval and the 3rd injection 5 months after the first dose), versus the vaccine schedule initially used (3 injections at 1-month interval). This trial will be the last phase 2 before testing the efficacy of the rSm14 vaccine candidate.

Schistosomiasis is a chronic infection endemic in 74 tropical and sub-tropical countries. Sub-Saharan Africa carries the highest burden (90%) of schistosomiasis which caused by both Schistosoma mansoni and Schistosoma haematobium. The prevalence of Schistosomiasis should be assessed to control of the infection. This is usually achieved through surveys based on the use of traditional parasitological methods as urine filtration for S. haematobium. However, these traditional methods are time consuming, require an experienced technician and multiple samples due to light-infection and irregular shedding. Therefore, the point-of-care Circulating Cathodic Antigen (POC-CCA) urine test has been developed for the diagnosis of S. haematobium infection which is simple, rapid, sensitive and specific assay.

To assess the influence of seasonal variations in Schistosoma haematobium transmission on treatment outcome (morbidity and re-infection)

Clinical Trial Phase:Phase III Primary Objectives: Compare Mirazid and Praziquantel cure rates for both Schistosoma species. Compare Mirazid and Praziquantel effect in lowering the intensity of infection for both Schistosoma species. Secondary Objective:Identify and compare the types and severity of side and adverse effects between the Mirazid and Praziquantel. Study Population:200 Schistosomiasis infected persons of both types of Schistosomiasis aged from 15-35 years. Those subjects will be selected from among those screened.Subjects will include both genders excluding chronically ill such as chronic liver disease patients and those with both types of Schistosomiasis. Recruitment Period:3 months and subjects follow up for another 3 months followed by 3 months for statistical analysis and report writing Study Duration: Total study duration is expected to be 9 months: 3 months for recruitment, 3 months for follow up and 3 months for data management and report writing. Endpoints: Will be measured at 3 months of successful administration of treatment either Mirazid or Praziquantel as per the randomization scheme. By then, final assessment of the response to treatment will be done by examining urine or stool of the subject for presence of Schistosoma eggs and its density if found. Three negative urine or stool samples collected 2-days apart at 12 weeks post treatment will indicate treatment success. One positive sample collected at week 12 will indicate infection with Schistosomiasis.

Urinary schistosomiasis is a debilitating disease in Central Africa and pregnant women are frequently suffering from this condition. Mefloquine is currently investigated as preventive treatment against malaria in pregnancy and mefloquine is also known to exert activity against schistosomiasis. The investigators want to test the hypothesis whether mefloquine may active against urinary schistosomiasis when used as preventive treatment against malaria in pregnancy.

Open labelled, non randomized study to evaluate the effects of Artemisinin based Combined Therapies(ACTs) on schistosomiasis since Praziquantel (PZQ) which is presently the drug of choice for treating Schistosomiasis (STS), is ineffective on immature stages and there is known parasite resistance. ACTs when combined with PZQ, targeting different stages of the life cycle has shown some effectivity.

The purpose of this study is to evaluate the impact of praziquantel for the treatment of Schistosoma haematobium infection among schoolchildren in Al Salamania in Central Sudan.

Objectives:To reduce the risk of S. haematobium pathology recurrences during the three years following vaccine administration and to control the safety of this therapeutic strategy in children exposed to urinary schistosomiasis. Methodology : Phase III trial, self-contained, randomized, double blind, in two parallel groups receiving 3 injections at D0, W4, W8 and a boost at W52, one group receiving "Bilhvax", the other one placebo, in S. haematobium infected children pretreated by two doses of PZQ (at W9 and W8) Patient included : Infected school children, 6 to 9 years of age. Primary objective : To demonstrate a significant delay of recurrence of the schistosomiasis pathology in vaccine group compared to control group in the 3 years period following the first administration (between D0 and W152). Secondary objective : safety Duration : February 2009 to March 2012

The purpose of this clinical study is to evaluate safety and immunogenicity in adult healthy volunteers of the vaccine candidate against schistosomiasis named Bilhvax.

Schistosomiasis remains an important parasitic disease in the tropics, special in Africa including Zanzibar. The WHO-recommended strategy to eliminate schistosomiasis involves large-scale treatment of affected populations through periodic, targeted treatment of school-children with praziquantel. Donated praziquantel is the key to achieving elimination. The increase in the number of treatments is attributable to many factors, including improved availability of donated praziquantel, essentially from Merck; new countries starting to implement large-scale schistosomiasis control programmes; geographical scale-up of treatment within countries; and improved reporting to WHO. The global target set by WHO in the Roadmap on neglected tropical diseases is to attain at least 75% coverage of preventive chemotherapy in pre-school and school-age children by 2020. Experience from China demonstrates that preventive chemotherapy (that is, large scale treatment without individual diagnosis) with high coverage can significantly impact indices of infection and reduce transmission. The praziquantel made in China has been used from 1990s, and have effectively activity against S. haematobium, special the good economic benefits. The project will propose to conduct an open-label, randomized trial to evaluate the comparative efficacy of Chinese-made Praziquantel versus WHO Praziquantel in the treatment of 200 people infected with S. haematobium in Pemba island Zanzibar. To do this the investigators will screen about 4000 people by examination of urine for schistosome eggs. Eligible participants will be randomized to receive a single dose of Chinese-made and WHO Praziquantel. Four weeks after treatment, the participants will be assessed for cure and egg reduction. The study may provide an alternative drug treatment for S. haematobium.