View clinical trials related to Vivax Malaria.
Filter by:This is a standard pharmacokinetic interaction study. Subjects will be randomized to be either group A or B. Group A. Subjects will have 3 hospitalizations to complete. Each hospitalization will be about 12-24 hours depends on each regimen. Subjects in A group who receive regimen 1 of primaquine (PQ) on the first admission (visit 2) will receive regimen 2 of primaquine and chloroquine combination (PQ and CQ) on second admission (visit 3) after 1 week wash out period and will finish with regimen 3 of Chloroquine (CQ) on the third admission (visit 4) after 8 weeks wash out period. Subjects in B group who receive regimen 1 of primaquine (PQ) will receive regimen 2 of chloroquine (CQ) on second admission (visit 3) after 1 week wash out period and regimen 3 of primaquine and chloroquine combination (PQ and CQ)on third admission(visit 4) with 8 week wash out period in between.
This is an open label two-arm randomized prospective study of two treatments for P. vivax malaria. Patients meeting study inclusion criteria will be enrolled and allocated either chloroquine alone or chloroquine plus primaquine (0.25mg/kg/day for 14 days). Patients will be followed-up for 1 year, with clinical and laboratory examinations at each visit. Patients with recurrent P. vivax infection will be treated with the same medication as initially randomized unless contraindicated. Recurrences in the two arms will be compared to estimate the risk of and mean duration to relapse, classify the relapse pattern as early or late relapse and to estimate the efficacy and safety of the study drugs. Polymerase Chain Reaction (PCR) analysis will be used as far as possible help to distinguish between relapse and re-infection. Samples for chloroquine pharmacokinetic analysis will be collected on day 7 from each study subject as well as on the day of recurrence if within 8 weeks of chloroquine
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.
Malaria is a major public health problem in many provinces of Afghanistan the failure rate of chloroquine (CQ) and amodiaquine (AQ) treated Plasmodium falciparum(Pf) malaria has risen to more than 60% overall and as high as 90% in Jalalabad. CQ remains fully effective against P vivax, and sulphadoxine-pyrimethamine (SP) remains effective against P falciparum (10-15% of cases fail to cure). The current malaria treatment protocol still continuing CQ for P.vivax and adopted Artmisinine based combination therapy (ACT) for treating (Pf) malaria, as most than 50% malaria has being diagnosed clinically, so due to this and other operational reasons the protocol needs to be simplified. By comparing 56 day PCR corrected cure rate of DHA-PPQ with the standard treatment regimen as primary objective and comparing the safety, gametocytecidal effect and parasite clearance time as secondary objectives, our study titled: Randomized, Open Label, controlled, non-inferiority clinical trial for comparison of Efficacy & safety, will provide scientific evidence to lead the simplification and improvement of the standard malaria treatment regimen in Afghanistan; to adopt a policy of treating both vivax and falciparum malaria with the same drug regimen. With a significance level (α) = 0.05 and a power=80%, the calculated sample size is 274 per study arm. Therefore about1100 patients (274 per study-arm: 548 patients with falciaprum malaria and 548 patients with vivax malaria) will be recruited in Malaria reference Centers (MRCs) of three malaria endemic provinces (Nangarhar in the east, Thakhar in the north-east and Faryab in the north-west of country) after signing written inform consent form, according the inclusion and exclusion criteria and will be treated as out patients by giving the randomized drug dose under observation of study team and followed-up daily for 3 days (as treatment course of either arm is once daily dose for three days) and after than weekly up to day 56. and the study is planed to conducted in 3 provinces of Afghanistan for approximately 2 years. Patients will be assessed clinically as well necessary laboratory tests will be performed and all the bio-medical findings will be recorded in special patient case record form, the electronic form of which will be broth to Trop. Med of Mahidol University for final analysis. The patients will be receiving the reasonable transportation cost for follow-up visits as well as one bed-net at the end of enrollment.
Plasmodium vivax represents a major health problem throughout the tropics. Outside Africa it accounts for over 50% of cases, affecting an estimated 70-80 million people per year. A substantial proportion of clinical cases are not caused by infective bites of Anopheles spp, but by activation of latent hypnozoites in the liver. These relapses may significantly impede development since each illness may result in 5-15 days of absence from work or school. Primaquine(PQ) is the only drug available that eliminates hypnozoites, though its use is beset by clinical problems; it may precipitate haemolytic anaemia in individuals deficient in the blood enzyme glucose 6 phosphate dehydrogenase (G6PD). Without affordable G6PD testing, primaquine use is precluded. Evidence suggests, however, that a course of 8 weekly doses may be a safe and effective alternative to the traditional 14 day course of the drug. The aim of the proposed study, therefore, is to test whether 8 weekly doses of primaquine is as effective as the 14 day course at preventing relapse malaria, without the risk of hemolysis in G6PD deficient individuals.
To determine whether two cheap antifolates (chlorproguanil-dapsone and sulfadoxine-pyrimethamine) which work against falciparum malaria in this region are sufficiently effective against vivax malaria to be deployed in areas where diagnosis is poor and the burden of malaria is high, a randomised controlled trial of the three drugs is being undertaken comparing their efficacy in treating malaria.
Chloroquine resistant falciparum malaria in Pakistan is prevalent in every malarious area examined. Resistance to the favoured second-line treatment, sulphadoxine-pyrimethamine S/P is rising fast. To avert a repetition of the resistance catastrophe that occurred in SE Asia it is critical to preserve the effective life of SP by using it in combination with artesunate. Efficacy of ACT with artesunate in combination with chloroquine, SP or amodiaquine for treatment of malaria (falciparum or vivax) will be examined in malaria patients in Pakistan.
Multidrug resistant strains of P.falciparum and P.vivax are becoming increasingly prevalent in the Asia Pacific rim. To determine the efficacy of locally recommended antimalarial protocols in Papua, Indonesia, consecutive patients presenting to a rural clinic were enrolled into a prospective efficacy study. Patients with uncomplicated falciparum malaria were treated with chloroquine plus sulfadoxine-pyrimethamine and those with vivax malaria with chloroquine monotherapy. Patients failing therapy received unsupervised oral quinine +/- doxycycline for 7 days. Follow-up was continued for 42 days for falciparum malaria and 28 days for vivax malaria. The study hypothesis was that current recommended antimalarial protocols were no longer effective.
This open randomized, parallel group, 6 week trial in two rural outpatient clinics will compare the safety and efficacy of a six dose coartemether regimen with 3 dose artekin regimen for the treatment of acute, uncomplicated falciparum and vivax malaria in adults and children (>10kg).