An observational study in Plasmodium Vivax Malaria Without Complication and Plasmodium Falciparum Malaria (Uncomplicated), sponsored by Ethiopian Public Health Institute. Not yet recruiting at 1 site in Ethiopia. Open to participants aged 6 Months and older. Per ClinicalTrials.gov, last updated 2026-09-25.
Sponsored by Ethiopian Public Health Institute · Observational
Background: The WHO recommends monitoring the efficacy of antimalarial drugs at least once every two years after implementation. The Ethiopian Public Health Institute (EPHI), the research arm for the Ministry of Health (MOH), has been studying the safety and efficacy of antimalarial drugs for the past two decades. The national malaria diagnosis and treatment guideline of Ethiopia states first-line treatment for uncomplicated Plasmodium falciparum (P. falciparum) infection is artemether-lumefantrine (AL) with a single dose of primaquine (PQ) and for uncomplicated P. vivax infection chloroquine (CQ) with 14 days of PQ. This study aimed to evaluate the therapeutic efficacy of AL plus a single low dose of PQ for uncomplicated P. falciparum malaria and CQ plus 14 days of PQ for uncomplicated P. vivax malaria in six sentinel sites of Ethiopia.
Methods: This study will be conducted from October 2026 to June 2027 in six sentinel sites. A minimum of 100 patients each with uncomplicated P. falciparum or P. vivax malaria aged 6 months and above, will be enrolled at each of the six study sites and followed for 28 days for P. falciparum and 42 days for P. vivax for adequate clinical and parasitological response. Patients with microscopically confirmed P. falciparum mono-infection will be assigned to receive AL + PQ, and those with microscopically confirmed P. vivax mono-infection will be assigned to receive CQ + PQ. Clinical, parasitological, and hematologic parameters will be monitored for P. falciparum and P. vivax infections for up to a 28/42-day follow-up period and used to evaluate drug efficacy. Kaplan-Meier method survival analysis and pertinent descriptive analysis will be conducted using STATA considering P \< 0.05 as statistically significant. Results from this research will be presented in text narration, tables and figures.
455 studies on the registry are indexed under Malaria, Falciparum; 37 are open to participants now.
This study's planned enrollment of 1,200 is above the median of 561 across 63 observational studies indexed under Malaria, Falciparum.
Browse Malaria, Falciparum studies →Ethiopian Public Health Institute is the lead sponsor of 8 studies on the registry; 1 is open to participants now.
Counted across the registry records on this site, refreshed daily.
The study population will consist of patients residing in malaria-endemic areas who self-present to the outpatient departments of the selected health facilities with uncomplicated P. falciparum or P. vivax malaria. Only patients living within the catchment area of the participating health facilities (within a 20 km radius) will be eligible for enrollment. This geographical restriction is intended to facilitate active follow-up through home visits for participants who fail to attend their scheduled follow-up visits, thereby minimizing loss to follow-up and ensuring complete outcome assessment.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
1. Presence of signs or symptoms of severe malaria or danger signs suggestive of severe malaria, as defined by the WHO (Annex I).
2. Severe malnutrition, defined as any of the following: weight-for-height or weight-for-age according to national/WHO criteria, bilateral pitting edema of nutritional origin, or mid-upper arm circumference (MUAC) \<11.5 cm for children aged 6-59 months 3. Mixed Plasmodium species infection. 4. Moderate to severe anemia ( \<8 g/dL) 5. Presence of febrile illness due to causes other than malaria requiring alternative treatment (e.g., measles, acute lower respiratory tract infection, or severe diarrhea with dehydration).
6. Presence of a serious or chronic medical condition that may interfere with study participation or outcome assessment (e.g., cardiac, renal, hepatic disease, sickle cell disease, or /AIDS).
7. Known pregnancy or pregnancy test positive or breastfeeding. 8. Women of who are unwilling or unable to use effective during the study period, where applicable according to the study drug requirements.
9. Known or allergy to the study medication or any alternative antimalarial treatment used in the study.
10. Current use of medications known to interfere with the pharmacokinetics, efficacy, or safety of the study antimalarial drugs (Annex II).
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Hemoglobin (Hb)
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Drug pages: Primaquine · Chloroquine
For uncomplicated P. falciparum patients, 3 days of a bid dose of Artemether-lumefantrine with a single low dose of primaquine. For uncomplicated P. vivax patients, 3 days dose of chloroquine with 14 days primaquine will be given under observation
Early Treatment Failure
1\. Danger signs or severe malaria on day 1, day 2 or day 3 in the presence of parasitemia; or 2. Parasitemia on day 2 higher than on day 0, irrespective of axillary temperature; or 3. Parasitemia on day 3 with axillary temperature ≥37.5 ºC; or 4. Parasitemia on day 3 ≥25% of count on day 0.);
Time frame: Day 1 to Day 3
Late Clinical Failure
1\. Danger signs or severe malaria in the presence of parasitemia on any day between day 4 and 28 for P.f or day 42 for P.v in patients who did not previously meet any of the criteria of Early Treatment Failure; or 2. Presence of parasitemia on any day between 4 and day 28 (day 42) with axillary temperature ≥37.5 ºC (or history of fever) in patients who did not previously meet any of the criteria of early treatment failure
Time frame: Between Day 4 and 28 for P.f and Day 42 for P.v
Late Parasitological Failure
Presence of parasitemia on any day between Day 7 and Day 28 for P.f or Day 42 for P.v and axillary temperature \<37.5 ºC in patients who did not previously meet any of the criteria of early treatment failure or late clinical failure.
Time frame: Between Day 7 and Day 28 for P.f or Day 42 for P.v
Adequate Clinical and Parasitological Response
Adequate clinical and parasitological response during 28 days of follow-up for P. falciparum and 42 days of P. vivax. It is the absence of parasitemia on Day 28 for P.f or Day 42 for P.v irrespective of axillary temperature in patients who did not previously meet any of the criteria of early treatment failure, late clinical failure, or late parasitological failure.
Time frame: Day 28 for P.f or Day 42 for P.v
Plan to share: Undecided
Start is estimated for Oct 2026; primary completion for Feb 2027, 4 months later.
Of 20 observational studies under Malaria, Falciparum, half reached primary completion within 19 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 43. This study's planned 4 months is below that.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is not yet recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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Ethiopian Public Health Institute