Active clinical trials for "Malaria"

TÜCHMI-002 is a single center, randomized, placebo-controlled, double-blinded, PfSPZ Challenge dose finding trial with two chemoprophylactic regimens and subsequent controlled human malaria infection (CHMI).

Background: - Malaria is caused by small germs carried by mosquitoes. People can get malaria if an infected mosquito bites them. Malaria destroys red blood cells and reduces oxygen in the blood. Most malaria is mild, but severe malaria kills at least 660,000 people each year. About 75% of these are children in Sub-Saharan Africa, most under age 5. Researchers want to find a safe vaccine that helps prevent malaria. Objectives: - To see if a new malaria vaccine is well tolerated and effective. Eligibility: - Healthy adults 18 35 years old who are not pregnant and live in Mali. Design: Participants will be screened with medical history, physical exam, and blood test. They will also have an ECG. Soft electrodes will be stuck to the skin. A machine will record the heart s electrical signals. Study participation will last about 1 year. Participants will be randomly placed in 5 groups. Some will get 2 doses of the PfSPZ vaccine weeks apart; some will get 3 or 5 doses of vaccine; some will get 3 or 5 doses of placebo. Doses will be given through a needle in the arm directly into the bloodstream. Then participants must stay at the clinic for 2 hours. After each dose, participants will return to the clinic several times for blood tests and physical exam. A week before the first dose and 2 weeks after the last, participants will take a full course of anti-malaria drugs. If a participant gets malaria during the study, they will take another course of anti-malaria drugs.

The proposed trial will evaluate whether relatively non immune populations in endemic countries can be effectively infected with aseptic, purified, cryopreserved sporozoites (PfSPZ Challenge) given intradermally.

The program's overall objective is to assess the impact of a package of interventions aimed at reducing malaria-related mortality and morbidity in pregnant women and newborns by ensuring access to a package of interventions designed to optimise the detection and treatment of malaria during pregnancy as well as improving the early detection and treatment of malaria during the third trimester.

The scaling up of Long Lasting Insecticidal Nets (LLIN) and the expansion of Indoor Residual Spraying (IRS) has contributed to a significant decrease of malaria worldwide. However these control methods tackle only indoor and night biting vectors. The proportion of transmission occurring outdoors and before sleeping hours or so-called "residual transmission" is steadily increasing and may compromise the effort towards malaria elimination. The purpose of this study is to raise evidence on the effectiveness of mass use of topical repellents in addition to LLINs in controlling malaria infections. A multidisciplinary approach will be used to collect information on the most important factors that contribute to the successful reduction of "residual malaria transmission". In a first objective the epidemiological efficacy of repellents on prevalence of malaria carriers and malaria incidence will be assessed. To achieve this goal 98 communities will be randomly assigned to one of two treatment arms (LLIN and LLIN + repellent). Within a community a cross sectional random sample of 65 people will be drawn at the beginning and the end of the malaria season to obtain an estimate of the malaria prevalence. The second objective will handle the entomological efficacy and persistence of the topical repellent on malaria vectors. And lastly the acceptability, adherence and adequacy of the topical repellents will be studied in a third objective.

Malaria transmission is falling in some parts of Africa as bed nets and anti-malarials become more widely available. However, transmission still persists and it appears that additional control measures are required. The leading malaria vaccine candidate in development is RTS,S which has efficacy against clinical malaria measured at 30-50% in the field. This partial protection might be enhanced by combination with other components. The other vaccination approach that has produced repeatable efficacy in humans is the use of viral vectors to induce T cell responses. Previous attempts with this vaccine approach have been effective in challenge studies in Oxford, but ineffective in the field, probably because of reduced immunogenicity with previous vector platforms. Recently, studies in Oxford, Kenya and the Gambia have shown higher levels of immunogenicity by using a chimpanzee adenovirus (ChAd63) followed by an attenuated vaccinia virus (modified vaccinia Ankara) to deliver the pre-erythrocytic antigen, multiple epitope string with thrombospondin- related adhesion protein (ME-TRAP). The increase in immunogenicity has lead to sterile protection in 3 out of 14 volunteers and partial protection in 5 out of 14 volunteers in challenge studies. The investigators propose a Phase 2b study of 120 healthy adult men in Senegal. The investigators will assess the efficacy and further evaluate the immunogenicity and safety profile of the vaccine regimen. The investigators also intend to assess the correlates of efficacy and natural immunity.

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 aim of this study is to assess the impact of an intervention to improve parenting practices, pre-academic and developmental skills, and use of mosquito nets for children in kindergarten in Liberia. A rigorous impact evaluation using a randomized, waitlist controlled design will be conducted to measure the impact of the intervention on three primary outcomes: positive parenting skills, children's cognitive and educational skills, and malaria knowledge and prevention behaviors.

The purpose of this study is to assess two new malaria vaccines, ChAd63 RH5 and MVA RH5, at different doses and alone or in combination. The study will enable us to assess the safety of the vaccines and the extent of the immune response in healthy volunteers. We will do this by giving volunteers one or two vaccinations, doing blood tests and collecting information about any symptoms that occur after vaccination. This is the first trial to use these vaccines in humans.

Malaria is a parasite, infection with which kills over 2 million people each year. It is a major problem for those who live in endemic areas and for travellers. There is a great need for a safe effective malaria vaccine. The purpose of this study is to examine a new vaccine designed to provide immunity during the blood stage of the malaria parasite's lifecycle. The vaccine consists of AMA1-C1 which is a mixture of two recombinant synthetic AMA1 proteins from two Plasmodium falciparum strains, Alhydrogel® which is an aluminium-based adjuvant and CPG 7909 - an oligodeoxynucleotide, which enhances immune response. This study will enable the investigators to assess: The ability of of a growth inhibition assay to predict the effectiveness of a malaria vaccine. The safety of the vaccine in healthy volunteers The response of the human immune system to the vaccine