View clinical trials related to Malaria, Falciparum.
Filter by:This is a retrospective non randomized cohort to evaluate efficacy of MAS3 on patients with uncomplicated P. falciparum malaria or mixed infection (P. falciparum + a non-falciparum species). The review of patients' records and blood samples will be performed for patients treated at the clinics of Shoklo Malaria Research Unit from the period of January 2003 to December 2013.
This study is a prospective, single arm, open-labelled clinical trial. The total number subjects will be 145 patients to receive Pyronaridine-artesunate once daily for 3 days. Dosing will be according to the body weight. All patients will have a blood smear examined daily during the first week by microscopy until parasite clearance (2 consecutive negative slides on two consecutive days; both asexual and sexual stages). A negative blood slide will be defined as parasite count negative per 1000 WBC in two consecutive days. The sample on day 3 will be taken as close as possible to 72h after the initial blood smear. Participant will follow up for 42 days to assess the drug efficacy and safety (Day 7, 14, 21, 28, 35 and 42).
Background: - Malaria is a severe infection caused by a parasite. People can get malaria if a mosquito that carries the parasite bites them. Malaria infection does not happen in the United States, but many people in Africa, Asia, and South America are at risk for it. Researchers want to test two vaccines that may help decrease malaria infection. Objective: - To see if two vaccines (Pfs25M-EPA/Alhydrogel and Pfs230DIM-EPA/Alhydrogel ) are safe in humans and cause an immune response that will prevent malaria parasites from correctly growing in the mosquito. Eligibility: - Healthy adults ages 18 50. Design: - There are several groups in this study. Each group will receive a different dose of the vaccine and some groups will received both vaccines. - Vaccinations will be given on two days about 4 weeks apart. - Participants will receive each vaccine as an injection into the arm. Blood will be drawn on the day of vaccination. - In the 4 weeks after receiving a vaccination, participants will have at least 3 clinic visits and 1 phone contact. They will have at least 3 more visits and 3 phone contacts over the next 6 months. - At each visit, participants will be evaluated for side effects to the vaccine and any new health changes or problems. They will be asked how they are feeling and if they have taken any medicine. Blood and urine samples may be taken at the visit. More follow-up visits may be needed to follow up on changes or problems.
To quantify the relative effectiveness, cost, and cost-effectiveness of fMDA and MDA with DHAp against no mass treatment for reducing P. falciparum parasite prevalence, confirmed OPD malaria case incidence and cohort infection incidence in areas of high and low malaria transmission and in a program-relevant manner that will permit adoption and adaptation for wider-scale deployment.
This is a prospective, open label, randomised controlled trial to assess the safety and efficacy of dihydroartemisinin-piperaquine and artemether-lumefantrine in children and adults with uncomplicated Plasmodium falciparum malaria infection. Molecular markers for antimalarial resistance will also be assessed and the presence of molecular markers in the parasites will be associated with treatment outcomes.
A single-centre, open-label, study using induced blood stage malaria infection to characterize the activity of MMV390048 against early Plasmodium falciparum blood stage infection.
The purpose of this study is to assess two types of new malaria vaccines in different combinations. The study will enable us to assess: 1. The ability of the vaccines to prevent malaria infection. 2. The safety of the vaccines in healthy participants. 3. The response of the human immune system to the vaccines. We will do this by giving 48 participants three sets of vaccinations over 8 weeks, then exposing them to malaria infection by allowing mosquitoes infected with malaria to bite under carefully regulated conditions. We will follow participants closely to observe if and when they develop malaria. If the vaccine combination provides some protection against malaria, participants will take longer to develop malaria than usual or will not develop malaria at all. We will also recruit 4 individuals to be control subjects - these participants won't receive any vaccinations but will be challenged with malaria. Vaccinated volunteers who do not develop malaria infection in the blood after being infected with malaria by mosquito bite the first time may be invited back to be again infected with malaria in a repeat challenge experiment. This would happen approximately 5-7 months after the first challenge. The purpose of this second challenge will be to see how long the protection of the investigational vaccine against malaria lasts.
The study is designed to establish infectivity of Plasmodium falciparum sporozoites (PfSPZ) via intravenous (IV) administration in three groups with different malaria immunity-status: 1. Adults with a history of lifelong malaria exposure without sickle cell trait (HbAA) 2. Adults with a history of lifelong malaria exposure with sickle cell trait (HbAS) 3. Adults without previous malaria episodes without sickle cell trait (HbAA) Initially a dose of 3,200 PfSPZ will be given and the time until thick blood smear positivity after challenge will be assessed. If in any of the groups with a history of lifelong malaria exposure, 50% or less of individuals become thick blood smear positive during the 28 days post injection of PfSPZ Challenge, the dose will be increased 4-fold to 12,800 PfSPZ in this group.
The objective of this study is to explore the role of fosmidomycin and piperaquine as non-artemisinin-based combination therapy for acute uncomplicated Plasmodium falciparum when administered over three days. Together, fosmidomycin and piperaquine fulfil the WHO criteria for combination therapy by meeting the three key parameters of having different modes of action and different biochemical targets while exhibiting independent blood schizonticidal activity. Like the artemisinins, fosmidomycin is fast-acting, has an excellent safety record and is active against existing drug-resistant parasites. Piperaquine has a long half life protecting fosmidomycin as a much shorter lived molecule against selection of resistant parasites and will provide post-treatment prophylaxis.
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.