View clinical trials related to Malaria.
Filter by:The study is a single center, varied dose, open label study. A maximum of eighteen volunteers will be exposed to live NF54 P. falciparum sporozoites (PfSPZ Challenge) by intradermal injection. Volunteers will be divided into three groups of 6 volunteers, each group spaced 25 days apart (21 days after the last challenge of the last volunteer from the previous dose group).
The incidence of malaria, including the incidence in pregnant women, is declining in many African countries. Thus, there is a need to re-examine the efficacy and cost effectiveness of giving intermittent preventive treatment with sulphadoxine-pyrimethamine in pregnancy (SP-IPTp) on several occasions during pregnancy, an intervention that is threatened by increasing resistance to SP. Possible alternatives to SP-IPTp need to be explored. This applies especially to areas with highly seasonal malaria transmission where women are at risk for only a short period of the year. The goal of this project is to determine whether in pregnant women who sleep under a long lasting insecticide treated bed net, screening and treatment at each scheduled antenatal clinic visit is as effective in protecting them from anaemia, low birth weight and placental infection as SP-IPTp. Primigravidae and secundigravidae who present at antenatal clinics in study sites in four West African countries (Burkina Faso, Ghana, Mali and The Gambia) will be randomised to one of two groups. All women will be given a long lasting insecticide treated bed net on first presentation at the antenatal clinic. Women in group 1 (reference group) will receive SP-IPTp according to the current WHO guidelines. Those in group 2 will be screened with a rapid diagnostic test at each scheduled antenatal clinic visit and treated if parasitaemic. Approximately 5000 women will be recruited, 2500 in each group. Women will be encouraged to deliver in hospital where maternal haemoglobin and birth weight will be recorded and a placental sample obtained. Those who deliver at home will be visited within a week of delivery and maternal haemoglobin and infant weight recorded. Mothers and infants will be seen again six weeks after delivery. Also at delivery peripheral maternal blood sample will be obtained for the diagnosis of malaria using RDT, microscopy and PCR. The primary end points of the trial will be birth weight and anaemia at 38 weeks (+/-2 weeks) of gestation. The study is powered to show non-inferiority of group 2 compared to group 1. The costs and cost effectiveness of each intervention will be evaluated. In the light of recent evidence suggesting that malaria infection during pregnancy, particularly in the last trimester may influence an infant's risk of malaria, we proposed to follow infants born to mothers recruited in the Navrongo site in Ghana who have received either IST or IPTp in pregnancy throughout the whole of their first year of life beyond the six weeks originally proposed. We have received approval for this from the ethic committees at Kwame Nkrumah University of Science and Technology, Ghana Health Service and Navrongo Health Research Centre. The aim is to obtain information on the incidence of both symptomatic and asymptomatic malaria infections in these infants during follow up of the infants. The study will provide information to national malaria control programmes on whether there are alternative, safe and effective methods to the SP IPTp regimen for reducing the burden of malaria in pregnancy.
Following the rapid development of significant drug resistance to both chloroquine and sulfadoxine-pyrimethamine (the first line therapy in Tanzania from 2001 -2006), artemether- lumefantrine (Coartem or AL) was adopted as first line therapy in Tanzania in 2006. Now that this drug has been widely used for some time, the investigators propose to conduct an antimalarial efficacy trial to monitor the effectiveness of this therapy, to determine if this drug remains efficacious, or if significant resistance has emerged, in which case a new antimalarial strategy will need to be contemplated. The investigators hypothesize that the efficacy of Artemether-lumefantrine remains high, and that the other artemisinin combination therapies will be equally efficacious. Children 6-59 months of age with symptomatic malaria will be randomly assigned to be treated with either artemether + lumefantrine (Coartem) or dihydroartemisinin-piperaquine (Duo-Cotecxin or Artekin). Clinical, parasitologic, and hematologic parameters will be monitored over a 42-day follow-up period and will be used to evaluate drug efficacy.
It is possible to safely protect human volunteers immunized with P. vivax irradiated sporozoites from P. vivax challenge with live sporozoites.
This was a phase I double blind controlled vaccine trial, evaluating safety, tolerability and immunogenicity of mixtures of N, R and C LSP derived from the P. vivax CS protein formulated in two adjuvants Montanide ISA 720 and Montanide ISA 51. The primary objective was to assess in malaria-naïve adults, the safety and reactogenicity of these peptides formulated in the two adjuvants We recruited 40 healthy men and women volunteers from Cali, Colombia, a city non-endemic for malaria. Volunteers were 19--41 years of age and had no history of malaria. During a period of three months a total of 100 volunteers were assessed for eligibility criteria in order to select a total of 40 volunteers willing to participate in the clinical trial. By consecutive allocation, eight participants were allocated to each of the five experimental groups (A--E): four groups (A--D) were immunized with the vaccine formulations at two different dose concentrations and formulated in two different adjuvants. A control group (E) was injected with placebo (saline solution)
The study project can be divided into two parts: (1) health screening for the community and (2) clinical diagnosis and treatment for patients at National Referral Hospital (NRH) in Solomon islands. The health screening includes a questionnaire, stool parasitic screening and blood laboratory tests. A total of 800 subjects will participate in this study. The collected samples are venous blood (20 ml/per subject) and stool in order to conduct the related tests mentioned above. As for the collection of target patients, KMUH will cooperate with NRH to collect two kinds of blood samples: the blood samples of confirmed malarial cases and those of cases suspicious of Flaviviral, Alpha-viral, Rickettsial, and Leptospiral infections. The expected received cases are 600 each year. The venous blood samples (20 ml/per subject) will be used to conduct related tests mentioned above. At the same time, the subjects will also have to fill out a related questionnaire which includes height, weight, waist line, heath behavior and habit, and past history, etc.
This is a continuous cohort study consisting of 200 participants (one third 6 months old to 5 years, one third 6 to 15 years old, one third ≥ 15 years old) i.e. a new patient will be recruited (from the same age group) for any patient who develops a Pv infection so that the cohort will always have 200 patients for 3 years. Each patient will be actively followed-up every 8 weeks until Plasmodium vivax infection occurs but the duration of follow up and the number of follow up visits for each patient will vary depending on when or if a vivax infection occurs and when the patient is recruited. Therefore, the minimum follow up period for each patient will be 6 months or time to vivax infection and the maximum will be 3 years if a patient does not get vivax infection and is recruited at the beginning of the study.
This is a randomised open label trial with follow up for 1 year. 660 adults and children above 6 months diagnosed with acute Plasmodium vivax will be randomised into 3 groups, either chloroquine, artesunate, or chloroquine/primaquine therapy. Participants will be screened on the day of inclusion then followed weekly for 8 visits and every 4 weeks until week 52. The primary objective of the study is to compare the efficacy of the WHO and Thai Ministry of Public Health recommended radical curative regimen of chloroquine and primaquine with the currently used monotherapy regimens of chloroquine and artesunate along the Thai-Burmese border.
The purpose of this study is to determine if adherence and effectiveness of AL in the treatment of uncomplicated malaria in children aged under five years using blister packs with pictorial leaflets can be at levels comparable to those with unit dosed age specific pre-packs.
Malaria is one of the major public health problems in Sub-Saharan Africa. In response to this threat, Roll Back Malaria (RBM) has rolled back a strategy using ACT as first line therapy for malaria episode, a wide distribution of Insecticide Treated Bednet (ITN), intermittent presumptive treatment of pregnant women and indoor residual spraying. Recent epidemiological observations suggested a decline in malaria prevalence in some countries but further evidences are still needed to confirm this evolution. The RBM strategy requires the use of reliable rapid diagnostic test (RDT) for which an operational assessment is necessary. Lastly, home-based management of malaria is also an important compound of this strategy. However, a better understanding of the actual use of antimalarial drugs, of the use of bednet and of the barrier to the use of health care is important to implement good quality strategies for malaria control. This study is a cross-sectional community based survey made of two rounds (one in January 2010 and the second in June 2010). The general objective is to measure the prevalence of infection with Plasmodium falciparum at two periods of the year (at the moment of lowest and highest transmission based on the seasonal rainfalls) and to compare it with the prevalence estimated in 2004 after the rainy season for the same area. Specific objective are the estimation of the prevalence by age stratum, the analysis of the geographical distribution of the infection, the description of the parasitological characteristics, the assessment of three RDT, the description and the analysis of the prevention and care seek behaviours related to malaria. The study area is the great Mbarara district located in south-west of Uganda. A three-stage cluster sampling method will be used. Spatial information will be collected with global positioning system and imported to Geographical Information System. Behaviour information will be collected through face to face interview.