Merozoite Surface Protein 1 Antibody Response in Asymptomatic Human Malaria Infection
The main purpose of this trial is to study whether a certain blood test can reliably identify the presence of malaria in people who have been infected with, but who do not have symptoms of malaria.
In this study, two groups of volunteers will be exposed to malaria through the bites of infected mosquitoes. In one group, volunteers will be given several doses of a drug called mefloquine, known to prevent the development of malaria symptoms. The other group will not be treated with any drug that could prevent symptoms or infection. After exposure, both groups will be monitored for a period of approximately 6 months to see if they develop symptoms of malaria. Any subjects who do so will be treated with appropriate medications. Subjects in both groups will have their blood checked regularly during this period for the presence of a certain malaria antibody called Merozoite Surface Protein 1, or Anti-MSP-1 for short, using a special blood test (also known as an assay). At the completion of the study, the results of all assays will be analyzed to determine if this test can be used to diagnose malaria infection in persons without symptoms.
Allocation: Non-Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Diagnostic
Mefloquine and Control Cohort
Walter Reed Army Institute of Research
Walter Reed Army Institute of Research (WRAIR)
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00761020
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Malaria caused by PLASMODIUM VIVAX. This form of malaria is less severe than MALARIA, FALCIPARUM, but there is a higher probability for relapses to occur. Febrile paroxysms often occur every other day.
Variation in health status arising from different causal factors to which each birth cohort in a population is exposed as environment and society change.
Vaccines made from antigens arising from any of the four strains of Plasmodium which cause malaria in humans, or from P. berghei which causes malaria in rodents.
A protozoan parasite that causes vivax malaria (MALARIA, VIVAX). This species is found almost everywhere malaria is endemic and is the only one that has a range extending into the temperate regions.
Malaria caused by PLASMODIUM FALCIPARUM. This is the severest form of malaria and is associated with the highest levels of parasites in the blood. This disease is characterized by irregularly recurring febrile paroxysms that in extreme cases occur with acute cerebral, renal, or gastrointestinal manifestations.
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