View clinical trials related to Schistosomiasis.
Filter by:The purpose of the study is to understand whether the drug praziquantel (PZQ) is metabolized or broken down differently when women are pregnant versus not pregnant. PZQ is used to treat schistosomiasis (worm infection). Researchers will study how PZQ is broken down among 15 women who are 12-16 weeks pregnant, 15 women who are 30-36 weeks pregnant, and 15 women nonpregnant women who are producing breast milk. All women will be 18 or older and otherwise healthy. The usual practice is to wait until after mothers have finished pregnancy and breast feeding before giving PZQ. Participants will receive 2 doses of PZQ separated by 3 hours. Study procedures will include a 24 hour hospital stay following administration of PZQ, blood, stool and urine samples, ultrasound if pregnant, and physical exams of mother and baby. Patient participation for mother/infant pair is about 9 months.
A longitudinal study on immune responses in relation to protection against clinical malaria episodes will be conducted in Apac District, Uganda. Three cohorts will be recruited: children 1 to 5 years of age (n=250), children 6 to 10 years of age (n=125) and adults 25 and above (n=125). After finger prick sampling (~300µL) and examination at enrolment, participants will be followed up for one year. Follow-up will include fortnightly active case detection and three-monthly cross-sectional surveys. Clinical malaria attacks and the associated clinical and parasitological parameters will be related to immunological profiles determined utilizing a protein microarray as a capture substratum to profile the humoral immune response against a vast number of parasite antigens. For individuals who experience a clinical malaria attack or who are diagnosed with high density parasitaemia (≥15,000 parasites/µL) during cross-sectional surveys, a 5mL blood sample is obtained to determine the diversity of parasite antigens in the population in relation to antigen recognition in the cohort.
This is a phase I, open-label, single arm trial, which aims to assess the safety of the vaccine prepared sm14 in healthy subjects. The product immunogenicity will be evaluated by conducting serology (anti-sm14 antibodies) and testing of cellular response to the antigen by the method ELI-SPOT. Each participant will remain in the study for approximately 4 months. The total study duration is 10 months, considering a period of 6 months for inclusion. Will be included in the study subjects male and female, between 18 and 49 years, that manifest their will to participate in the research by signing an Informed Consent Form. Eligible population for the study are subjects who do not present at screening significant changes in renal, cardiac and liver functions, complete blood count, clotting, present no acute or chronic illnesses, are not in the chronic use of any medication, do not have HIV infection or other immunodeficiency. Pregnant or breastfeeding women will not be included. Volunteers will receive three doses of vaccine prepared sm14, in doses containing 50 mcg of the antigen, associated with adjuvant GLA-SE at a dose of 10 mcg, with an interval of 30 days between each application. Twenty volunteers will be included in the study. This is a convenience sample, established for the first test of the product in humans, for the initial safety assessment.
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.
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
A cross-sectional study of urogenital schistosomiasis and sexually transmitted infections (STI) prevalence and associated morbidity in a rural community in Madagascar. Clearance of infections and resolution of morbidity were subsequently studied in two phases following systematic anti-STI and anti-schistosoma treatment, respectively.
The purpose of the study is to understand whether the drug praziquantel (PZQ) is safe for the mother and developing baby when the mother has schistosomiasis (a type of worm) infection, and whether the drug may improve the mother's and baby's health. The usual practice is to wait until after a mother has finished breast feeding before giving the medicine. Approximately 375 infected pregnant women, ages 18 and over, in endemic villages in Leyte, The Philippines will participate. Study volunteers 12-16 weeks pregnant will be given PZQ or an inactive pill (placebo) and stay in the hospital overnight. Small blood samples will be collected before and after the medication is taken. Three stool and urine samples will be taken during a total of 7 study visits. An ultrasound image (picture or outline of the unborn baby) will be performed. When the baby is born, a small blood sample will be taken. Mother and baby will be followed for up to 8 months before the baby is born and 1 month after.
Schistosomiasis and soil-transmitted helminhtiasis occur throughout the developing world and are most prevalent in the poorest communitites. These worms have been linked to several nutritional and intellectual deficiencies in many endemic populations worldwide. Helminth control, though crucial has been neglected for varied reasons. Currently, interests towards the control of neglected diseases including schistosomiasis and soil-transmitted helminths has been revived through many interventions including repeated chemotherapy to help improve public health outcomes and prevent long term morbidity. This will contribute to achieving several of the Millennium Development Goals at a favourable cost. A community-directed treatment of human schistosomiasis and STH in school-aged children in rural notrhern Ghana using praziquantel and albendazole is proposed. It is planned to test the hypothesis that community-based volunteers are non-inferior and more cost effective than rural school teachers at reaching school-aged children.
Cross-sectional study of prevalence and intensity of schistosome infection in pregnant women, follow-up into postpartum, and the association of schistosome infection with haemoglobin concentration, compared to a group of non-pregnant women.
Current efforts to control schistosomiasis and soil-transmitted helminthes infections focus on the school-age population, and school-based treatment delivery programs offer a major cost advantages because of the use of the existing school infrastructure and the fact that schoolchildren are accessible through schools. However, in many developing countries, large numbers of school-age children are not in school and this has raised questions about the effectiveness of school-based programs in reaching non-enrolled children. Increasingly, the non-formal education sector is providing a growing solution to the problem of poor enrolment in basic education, especially in sub-Saharan Africa, and has recently been used to deliver praziquantel as part of a national schistosomiasis control program in Uganda. However, it is unclear how effective this program has been in reaching children who attend non-formal schools and whether the program has been reaching children from the poorest households.