12 Clinical Trials for Various Conditions
This is an open label, Phase 2 study with controlled human malaria infection (CHMI). Twenty three subjects will be enrolled into 2 groups (15 subjects in the Chloroquine-Azithromycin \[CQ/AZ\] Intervention Group, and 8 subjects in the Chloroquine \[CQ\] Group). The CQ/AZ Group will receive experimental intervention of 300 mg of CQ and 2 g of azithromycin (AZ). The CQ Group will receive 300 mg of CQ only. All subjects will participate in the CHMI and will be required to stay at a hotel for evaluation for a maximum of 14 nights starting 7 days after the challenge. A standard dose of atovaquone-proguanil (Malarone®) will be administered to all symptomatic parasitemic subjects under directly observed treatment.
Estimate the relative bioavailability of co-administered azithromycin microsphere (2000 mg) and the chloroquine (620 mg CQ base) test formulation compared to co-administered immediate release individual tablets of azithromycin (2000 mg) and chloroquine (600 mg CQ base) in healthy adult subjects.
A 2x2 randomized crossover of single dose malarone at rest and during moderate intensity exercise under controlled conditions of heat and humidity in healthy adult participants. Statistical analysis of AUC and Cmax will be performed to determine pharmacokinetic changes.
The purpose of this study is to determine whether Malarone ®, which is a drug approved to prevent malaria when taken daily, will still effectively prevent malaria if taken weekly.
The study is a single centre, randomised, placebo-controlled, double-blind study with DSM265 including up to two cohorts of healthy male and female volunteers aged 18 to 45 years. The study will be conducted into two sequential parts (Cohort 1 and Cohorts 2a and 2b).
More than 3 billion people worldwide are at risk of acquiring malaria and pregnant women living with HIV in Africa are at particular risk. An effective prophylaxis regimen capable of preventing malaria and other common perinatal infections would have great potential to improve adverse birth outcomes. The purpose of this randomized controlled trial is to evaluate a new combination prophylaxis regimen in pregnant women with HIV in Cameroon to determine its efficacy and safety.
The purpose of this study is to determine if sterile, protective immunity to malaria can be induced by malaria parasite exposure limited to the early liver stage of the parasite lifecycle.
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.
The purpose of this study is to assess the safety, tolerability and immunogenicity of two dose levels (1x10\^10 and 5x10\^10 virus particles (vp)) of the adenovirus serotype (Ad) Ad35.CS.01/Ad26.CS.01 prime-boost malaria candidate vaccine, followed by an evaluation of the protective efficacy of the higher dose level in an experimental malaria challenge. The study will be in 3 phases: 1. a dose escalation / vaccination phase in which both dose levels will be tested 2. a malaria challenge phase in which only subjects receiving the Ad35.CS.01/Ad26.CS.01 5x10\^10 vp dose level, together with six infectivity control subjects, will be exposed to experimental challenge with Plasmodium falciparum 3. a long term follow up phase in which all subjects who received active vaccine from both dose levels and/or malaria challenge will be included
This is a First-in-Human (FiH), randomized, two-part, dose-escalation trial of MAM01 monoclonal antibody (mAb) targeting the Plasmodium falciparum (Pf) Circumsporozoite Protein (CSP). This study will evaluate the safety, tolerability, pharmacokinetics (PK), and protective efficacy of MAM01, as well as safety and PK of repeat subcutaneous (SC) dosing. Part A will have a double-blind, placebo-controlled design. Part B will randomize participants to one of three open-label MAM01 dose groups; a separate non-randomized group will be enrolled to include participants who will receive no treatment and act as infectivity controls.
Background: Malaria is a parasitic disease carried by mosquitoes in tropical areas. There is no vaccine to prevent malaria infection. If not treated right away, it can become serious or deadly. Researchers want to test a drug to prevent malaria. Objective: To test if the drug L9LS is safe and if it prevents malaria infection in people. Eligibility: Healthy adults ages 18-50 who have never had malaria. Design: Participants were screened with a medical history, physical exam, and blood tests. Participants were divided into 6 groups: * Three groups received L9LS by infusion into a vein, and gave blood samples before and after infusion. * One group received L9LS injected into the fat under the skin. * One group did not get L9LS. * One group received L9LS injected into the muscle. All participants who received L9LS were monitored for side effects. They had 2-3 follow-up visits during the week after the drug was given, and gave blood samples. They received a thermometer to check their temperature daily for 7 days. They received a tool to measure any redness, swelling, or bruising at the injection site. Most participants took part in the controlled human malaria infection (CHMI) or malaria challenge to find out if L9LS prevents malaria after being bitten by infected mosquitos. Participants in the group who received L9LS injected in the muscle were enrolled after CHMI and did not take part in the CHMI. Participants who received CHMI were bitten by mosquitoes carrying the malaria parasites. A cup containing mosquitoes was placed on their arm for 5 minutes. On days 7-17 after exposure, they received daily study visits to give blood samples. Those who got malaria were treated immediately. On day 21, all CHMI participants received treatment for malaria. Participation lasted 2-6 months, depending on study group.
Background: People get malaria when they are bitten by an infected mosquito. Malaria can be serious and sometimes deadly. Although there are medicines to treat malaria, there is no vaccine that fully prevents infection. Researchers want to test if an experimental drug can help. Objective: To test the safety and effectiveness of a drug called CIS43LS that could prevent malaria infection. Eligibility: Healthy people ages 18-50 who have never been infected with malaria Design: Participants were enrolled on the basis of eligibility criteria, evaluated by clinical laboratory tests, self-reported medical history, and physical examination. Participants received CIS43LS either infused into a vein in their arm or injected into the fat under the skin. They were monitored for side effects for up to 4 hours after they received the drug. Participants received a thermometer and recorded their temperature and symptoms every day on/with/via a diary card for 7 days after administration. The administration site was checked for redness, swelling, itching or bruising. Participants had up to 12 follow-up visits. At follow-up visits, participants had blood drawn and were checked for health changes or problems. Most participants who received CIS43LS took part in a Controlled Human Malaria Infection Challenge (CHMI) along with control participants who did not receive CIS43LS. During the CHMI, mosquitoes carrying the malaria parasite bit participants in a controlled setting. The participants had clinic visits every day for up to 12 days starting 7 days after the CHMI. Participants were treated right away with antimalarial medication if they tested positive for malaria. Approximately 21 days after the CHMI, participants were treated with antimalarial medication for 3 days. The study lasted 2-6 months depending on the participant's study group.