View clinical trials related to Malaria.
Filter by:This is an open label, human pilot study to optimise controlled human malaria infection (CHMI) administered by Plasmodium falciparum sporozoites (PfSPZ. Volunteers will be inoculated with PfSPZ Challenge. The route of administration and dose will vary in order to identify the optimal regimen that achieves the greatest infection rate in volunteers with Plasmodium falciparum. All volunteers recruited will be healthy adults aged between 18 and 45 years. Safety and infectivity data will be collected for each of the regimens.
This is an open label uncontrolled study to determine the efficacy of fosmidomycin and clindamycin when co-administered orally over three days in the treatment of acute uncomplicated Plasmodium falciparum malaria in children. The primary study endpoints will be the cure rate on Day 28 (PCR corrected). The secondary endpoints will be the cure rate on Day 7 and the parasite and fever clearance times.
A Phase III malaria prevention trial was conducted in two camps of Liberian refugees in Sierra Leone using Insecticide Treated Polyethylene Sheeting (ITPS) or untreated polyethylene sheeting (UPS) randomly deployed to defined sectors of each camp. The ITPS was impregnated with pyrethroid insecticide during manufacture. In Largo camp the ITPS or UPS was attached to inner walls and ceilings of shelters, while in Tobanda the ITPS or UPS was used to line the ceiling and roof only. Cohorts of children up to 3 years of age were cleared of malaria parasites and monitored for up to 8 months post construction for possible malaria re-infection. Installation teams and refugee groups were blinded as to whether the sheeting was insecticide treated or not.
Although the risk of malaria is greatest in early childhood, significant numbers of schoolchildren remain at risk from malaria infection, clinical illness and death. By the time they reach school, many children have already acquired some clinical immunity and the ability to limit parasite growth, and thus most infections are asymptomatic and will go undetected and untreated. Asymptomatic parasitaemia contributes to anaemia, reducing concentration and learning in the classroom, and interventions aiming to reduce asymptomatic parasite carriage may bring education, as well as health, benefits. Intermittent parasite clearance (IPC) delivered through schools is a simple intervention, which can be readily integrated into broader school health programmes, and may usefully supplement the community-distribution of insecticide-treated nets (ITNs) in countries with a policy of universal coverage of nets. This study seeks to establish whether intermittent parasite clearance undertaken once a year at the end of the malaria transmission season can reduce malaria parasite carriage and anaemia amongst school-going children already using insecticide-treated nets, and its consequent impact on school attendance and performance, in order to assess its suitability for inclusion as a standard intervention in school health programmes in areas of seasonal malaria transmission.
Infants in malaria-endemic regions of Africa are an important target for vaccination against malaria in view of the enormous disease burden of malaria in this population. The purpose of this trial is to assess the safety and immunogenicity of MVA ME-TRAP and AdCH63 ME-TRAP candidate vaccines in healthy children in a malaria endemic region. The regimen proposed here has protected non-immune volunteers in Oxford against sporozoite challenge, and so may be protective against naturally acquired infection in the Gambia. Administration of AdCh63 ME-TRAP and MVA ME-TRAP to infants in this study will occur at intervals of at least two weeks from the administration of routine infant immunisations, given according to the Gambian EPI.
This is an open label phase I study, to assess the safety of a novel malaria vaccine, AdCh63 CS, simian adenovirus encoding Plasmodium falciparum liver stage antigen, Circumsporozoite protein. All volunteers recruited will be healthy adults. They will be primed with various doses of AdCh63 CS administered intramuscularly. Some of the volunteers will receive a booster vaccination with MVA CS administered via intramuscular route. Safety data will be collected for each vaccination regimen. Secondary aim of this study will be to assess the immune responses generated by vaccination.
Malaria is a major public health problem. 250 million cases annually leads to approximately 1 million deaths. Over 80 per cent of these deaths occur among African children under age five. The main interventions covered treatment with Artemisinin Combination Therapies (ACT), long lasting bednets distribution and Rapid Diagnosis Tests (RDT) to improve malaria diagnosis. This has led in Senegal to a substantial decrease in the incidence of malaria, in 2009. However the recent overall decline hides the fact that malaria incidence remains very high in the south of Senegal. That's why Home-based management (HMM) for malaria is being introduced in selected areas. Intermittent Preventive Treatment (IPT) by monthly administration of a therapeutic dose of antimalarials can achieve a very high degree of protection from attacks of clinical malaria in children. The purpose of this project is to evaluate the effectiveness of combining IPTc with HMM in southern Senegal The study objectives are to : - Assess the tolerance of IPTc using SP+AQ when it is administered for a longer period in areas with a longer transmission season, - Assess the added benefit that IPT with the association of Sulfadoxine-Pyrimethamine + Amodiaquine can offer in populations where a rapid and early care with home management of malaria is already established. - Determine the cost benefit ratio of the addition of IPTc with HMM. A cluster randomized controlled trial has been designed to evaluate the effectiveness of adding seasonal IPTc with sulfadoxine-pyrimethamine plus amodiaquine (SP+AQ) for 5 months per year, in villages where home-based management of malaria is implemented. All villages in Saraya district, excluding 7 villages with a health post, will be eligible to participate. Saraya villages will be combined to form 24 clusters which will be randomized to receive HMM from a community volunteer, or IPTc plus HMM. Trained volunteer Community Medicine Distributors (CMD) will provide HMM. The primary endpoint will be the incidence of clinical malaria with fever or history of fever and parasitaemia with density of at least 3000/ul. Secondary outcomes will include the safety, the tolerability, the coverage and acceptability of the intervention. Both the recurrent and capital costs to the health service of training staff and delivering the interventions will be estimated. Both direct and indirect costs to users of the services (children and their families) will also be assessed.
The purpose of this study is to test prevention strategies for pregnancy-related malaria. Researchers will compare different malaria treatments and treatment schedules which include chloroquine therapy (weekly doses versus being dosed twice during pregnancy for 3 days each time) to the standard practice of preventive treatment intervals in pregnancy (with the drug sulfadoxine-pyrimethamine given twice during pregnancy). Participants will include 900 pregnant women, who will be assigned to one of three treatment groups. Blood samples will be collected at every visit before birth and any time the participant is ill to determine if malaria is present. Pregnant women will be monitored during pregnancy and newborns will be assessed at birth and followed until about 14 weeks. Participant involvement in the study is expected to last about 12 months.
Background: - Malaria parasites are carried by mosquitoes, which spread the infection by biting people. Currently, there is no effective malaria vaccine. However, studies show that volunteers bitten many times by mosquitoes that carry weakened malaria parasites could fight off getting sick with malaria when later exposed to normal malaria parasites. Malaria parasites are weakened by exposing them to radiation when they are in the stage of development called sporozoites . Only the mosquitoes are irradiated and study volunteers are not exposed to radiation. The radiation stops the parasites from being able to cause disease but still promote protection. For many years, it was not possible to give these sporozoites to people as a vaccine since they could not be adequately purified from the mosquito. Scientists have recently figured out how to produce and isolate the weakened sporozoites so that they can be given in an injected vaccine. This vaccine is known as the "PfSPZ vaccine". - A malaria challenge will be used to test whether the vaccine will prevent infection. In a malaria challenge, mosquitoes that have the malaria parasite will be allowed to bite a participant's arm. In the event that the vaccine does not work, the malaria parasite used for the challenge can be treated completely with common anti-malaria medications. Participants will be treated immediately if they develop malaria symptoms. Objectives: - To test the safety and effectiveness of the PfSPZ vaccine. Eligibility: - Healthy volunteers between 18 to 45 years of age. Design: - Participants will be screened with a physical exam, medical history, and blood tests. There will be five different groups of study participants, all of whom will be monitored with frequent blood tests. - Group 1 will have two vaccines with the lowest amount of the vaccine given 4 weeks apart, with regular clinic visits up to 24 weeks after the second vaccine. This group will not have a malaria challenge. - Group 2 will have four or six vaccines given 4 weeks apart at a higher dose than group 1. A malaria challenge will be given about 3 weeks after the last vaccine. Follow-up visits will continue through 24 weeks after the last vaccine. - Group 3 will have four or six vaccines given 4 weeks apart at a higher dose than group 2. A malaria challenge will be given about 3 weeks after the last vaccination, as for Group 2. Follow-up visits will continue through 24 weeks after last vaccine. - Group 4 will have four or six vaccines given 4 weeks apart at a higher dose than group 3. A malaria challenge will be given about 3 weeks after the last vaccination. Follow up visits will continue through 24 weeks after last vaccine. - Group 5 will serve as a control group and will not receive the vaccine, but will have the malaria challenge. Follow-up visits will continue through 8 weeks after the challenge. All participants from any group who receive a malaria challenge will be treated promptly for malaria when it develops.
Background: - The malaria vaccine Pfs25-EPA/Alhydrogel may help block malaria parasites from developing in mosquitoes. When a mosquito bites a vaccinated person, the vaccine should prevent parasites from developing in the mosquito. As a result, the mosquito will not spread malaria to the next person it bites. However, the vaccine will not directly prevent people from getting sick with malaria. Researchers want to test the safety of and response to this vaccine. Objectives: - To test the safety of the malaria vaccine Pfs25-EPA/Alhydrogel. Eligibility: - Healthy volunteers between 18 and 50 years of age. Design: - Participants will be screened with a medical history, physical exam, and blood tests. - They will be assigned to a study group to have either two or three doses of the vaccine. Participants will have checkups after each dose of vaccine, - The additional doses will be given 2 months or 2 and 4 months after the first vaccine. - Participants will have regular blood tests to check the level of the response to the vaccine. - They will be followed for up to 1 year after the last vaccine to have any additional tests as needed.