Active clinical trials for "Malaria"

To assess the safety and reactogenicity of the FMP-1/AS02A malaria vaccine in malaria-exposed children living in western Kenya and aged 12-47 months

This phase IIb trial is being done to find out if the RTS,S/AS01 vaccine helps to prevent children from falling ill with malaria and to evaluate vaccine safety. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.

Malaria is an important cause of death and serious illness among Mozambican children. Although the risk of malaria can be reduced by drugs and by impregnated bed nets, it would be helpful if children could be protected against malaria by a vaccine. GSK Biologicals is developing in partnership with Malaria Vaccine Initiative at PATH a candidate malaria vaccine RTS,S/AS02 for the routine immunization of infants and children living in malaria endemic areas. The vaccine would offer protection against malaria disease due to the parasite Plasmodium falciparum and also would provide protection against infection with hepatitis B virus. Previous studies have shown the candidate malaria vaccine RTS,S/AS02 to be safe when administered in adults and children aged 1-11 years. However, to assess if this vaccine could provide protection against malaria in children, this study has been undertaken.

The purpose of this study is to compare the efficacy and cost-effectiveness of three alternative strategies for the prevention of malaria during pregnancy in an epidemic-prone area of low transmission in the East African Highlands. The strategies being compared are: intermittent preventive treatment with sulfadoxine-pyrimethamine (IPT-SP) an insecticide treated net (ITN), and intermittent preventive treatment with SP plus an ITN In addition to the main individually-randomised trial, outcome data was subsequently also gathered on pregnant women whose houses where sprayed with indoor residual insecticides (IRS) as part of a non-randomised district-wide control programme to compare the impact of IRS with the three intervention arms.

SUMMARY Background: Malaria is the leading cause of morbidity and mortality among pregnant women in Uganda. Although effective tools for prevention and control of malaria exist, their delivery presents a problem. Intermittent presumptive treatment (IPT) with sulfadoxine-pyrimethamine (SP) is effective, yet >60% of women in Uganda do not get it as < 40%, attend antenatal care. Effective ways of delivering IPT with SP to pregnant women at a community level need to be developed. This study assessed whether community based resource persons like traditional birth attendants (TBAs), community reproductive health workers (CRHWs), adolescent peer mobilizers (APMs) and drug-shop owners (DSV) can distribute IPT with SP to pregnant women. Objectives: The objectives of this study were: To assess community based approaches for delivering malaria prevention to pregnant women in Uganda; To assess community perceptions, beliefs and practices associated with malaria treatment and prevention in pregnancy; To assess whether community based resource persons can deliver IPT to pregnant women and reach those most at risk; To assess the impact of IPT on anaemia and pregnancy outcome; To estimate cost-effectiveness of the approaches and assess the acceptability and sustainability of the approaches. Methods: The study was conducted in 5 sub-counties of the Mukono district, situated on the shores of L. Victoria in Central Uganda. The district is hyper-endemic for malaria. 25 parishes with a total population of 75,000 people were used to test the new approaches. Phase 1 obtained qualitative data on community perceptions, beliefs and practices associated with malaria prevention in pregnancy. Phase 2 was an intervention study that assessed distribution of IPT to pregnant women by TBAs, CRHWs, APMs and DSVs compared with health units. Pregnant women of all parities were enrolled. Key resource persons in each parish were identified to sensitise the communities on the intervention. Data was collected regarding: timing of the first dose of SP, proportion of women who complete two doses of SP, birth weight of babies, proportion of low birth-weight babies, and proportion of adolescent pregnancies. The third phase of the study evaluated the sustainability of the approaches. Work Plan: The first phase of the study took two months. The second phase took 14-16 months. Data analysis was expected to take 12 months.

The purpose of this study is to study resistance to current malaria treatments and affordable alternatives for uncomplicated malaria. Resistance occurs in areas where these treatments are used frequently. This study may help prevent future resistance. About 150 residents in Buenaventura, Colombia will participate. They will have uncomplicated malaria and they will be followed for 28 days after treatment. Physical exams and blood draws are included in study visits.

The investigators hypothesize that sex, age, area of exposure and purpose of travel are associated with different travel-related infections. The investigators also hypothesize that certain infections will have long-term sequelae. Health-data will be collected from travellers from Switzerland and Europe. The project starts with a pilot study for 50 travellers, followed by the recruiting of 10,000 travellers. The data collection will be via a mobile App (ITIT). The ITIT App will collect active data from travellers. The participants will download the App after signing an electronic consent form and completing a baseline questionnaire. Then the travellers will answer a short daily questionnaire about illness symptoms during travel. The ITIT App will also collect passive data (GPS localisation, environmental and weather data). The project will provide real-time data on travel-related infections and profile travel illness by age, sex and purpose of travel and also identify outbreaks.

Understanding the sexual conversion of the malaria parasite is essential to interrupt malaria transmission. A new tool is developed that, based on expression analysis of sexual stage biomarkers, will estimate sexual conversion rates in natural infections.

This study aims to provide National Malaria Control Programs (NMCP), international donors and other key stakeholders with clear evidence on the impact and cost-effectiveness of using indoor residual spraying (IRS) with a non-pyrethroid insecticide in a high malaria transmission area that has universal long-lasting insecticidal net (LLIN) coverage. This is an interventional study with IRS serving as the research intervention. The district of Mopeia, in the province of Zambezia, Mozambique will be the study site. This is a high transmission area with a malaria parasite prevalence of 54% in children. The Ministry of Health distributed LLINs in Mopeia in 2014-2015. The NMCP through funding from President's Malaria Initiative Africa Indoor Residual Spraying Project (PMI-AIRS) was able to cover half a district with indoor residual spraying. A simplified census took place in mid-2016 to determine the number of children five years of age and under in the district and enumerate and map the households to assist in implementation. From the 115 villages/bairros existent in Mopeia, 86 clusters were randomized in a government randomization ceremony to either receive IRS with Actellic or maintain no IRS. The IRS was implemented through a partnership between the NMCP and PMI-AIRS according to standard operational and consent procedures. From each cluster, a cohort of 18 children five years of age and under will be followed monthly to assess malaria incidence at the community level in both IRS and non-IRS villages. There will be 774 children in the IRS villages and 774 children in the no-IRS villages (total cohort will be 1548). Additionally, the routine health centre reporting system will be strengthened to assess malaria incidence in children five years of age and under by passive case detection. Three cross sectional studies in April 2017, April 2018, and April 2019 will assess changes in net use, health seeking behaviour and malaria prevalence at the community level. Entomological data will be collected from both IRS and non-IRS areas to assess the vector dynamics and insecticide resistance pattern of the local vector populations from sprayed and unsprayed areas. Data on the costs of the implementation as well as health-related expenditures at health system and household levels will be collected prospectively throughout the study. These costs will be determined using both health system and societal perspectives. The incidence rate in IRS and no-IRS areas will be combined with the micro-costing data to calculate the cost per case averted at community and health facility level. These findings will be disseminated to the NMCP and international donors and stakeholders to complement the World Health Organization (WHO) guidance on combining indoor residual spraying and long-lasting insecticidal nets.

Study designed to evaluate safety and tolerability of a genetically attenuated P. falciparum (GAP3KO) that arrests early in the liver stage of the parasite life cycle. Study will also confirm the attenuation of the GAP3KO parasites using peripheral blood smears. Secondary objectives are to evaluate the humoral immune responses to GAP3KO.