Malaria

Overview of malaria treatment

Malaria is an entirely preventable and treatable disease. The primary objective of treatment is to ensure the rapid and complete elimination of the Plasmodium parasite from the patient’s blood in order to prevent progression of uncomplicated malaria to severe disease or death, and to prevent chronic infection that leads to malaria-related anaemia.

From a public health perspective, the goal of treatment is to reduce transmission of the infection to others, by reducing the infectious reservoir, and to prevent the emergence and spread of resistance to antimalarial medicines.

Importance of diagnostic testing

Patients with suspected malaria should have parasitological confirmation of diagnosis with either microscopy or rapid diagnostic test (RDT) before antimalarial treatment is started. Treatment based on clinical grounds should only be given if diagnostic testing is not immediately accessible within two hours of patients presenting for treatment. Prompt treatment – within 24 hours of fever onset – with an effective and safe antimalarial is necessary to prevent life-threatening complications.

Treatment of uncomplicated malaria

Treatment of P. falciparum infections

WHO recommends artemisinin-based combination therapies (ACTs) for the treatment of uncomplicated malaria caused by the P. falciparum parasite. By combining two active ingredients with different mechanisms of action, ACTs are the most effective antimalarial medicines available today. WHO currently recommends five ACTs for use against P. falciparum malaria. The choice of ACT should be based on the results of therapeutic efficacy studies against local strains of P. falciparum malaria.

ACTs are the mainstay of recommended treatment for P. falciparum malaria and, as no alternative to artemisinin derivatives is expected to enter the market for at least several years, their efficacy must be preserved. WHO recommends that national malaria control programmes regularly monitor the efficacy of antimalarial medicines in use to ensure that the chosen treatments remain efficacious.

Oral monotherapy and artemisinin resistance

Artemisinin and its derivatives must not be used as oral monotherapy, as this promotes the development of artemisinin resistance. Moreover, fixed-dose formulations (combining two different active ingredients co-formulated in one tablet) are strongly preferred and recommended over co-blistered, co-packaged or loose tablet combinations, since they facilitate adherence to treatment and reduce the potential use of the individual components of co-blistered medicines as monotherapy.

Treatment of P. vivax infections

P. vivax infections should be treated with chloroquine in areas where this medicine remains effective. In areas where chloroquine-resistant P. vivax has been identified, infections should be treated with an ACT, preferably one in which the partner medicine has a long half-life.

Treatment of severe malaria

Severe malaria should be treated with injectable artesunate (intramuscular or intravenous) and followed by a complete course of an ACT as soon as the patient can take oral medicines. Where injectable treatment cannot be given, patients with severe malaria should immediately receive pre-referral treatment with intra-rectal artesunate and be referred to an appropriate facility for full parenteral treatment.

Full details on WHO’s treatment guidelines can be found in the WHO guidelines for the treatment of malaria, second edition.

Expansion of access to ACTs

In recent years, access to ACTs has expanded substantially. By the end of 2012, ACTs had been adopted as first-line treatment policy in 79 countries. In 2012, 331 million ACT treatment courses were delivered to both the public and the private sectors in endemic countries – the latter mainly through the Affordable Medicines Facility – malaria, or AMFm, managed by the Global Fund to Fight AIDS, Tuberculosis and Malaria.

Expanding case management at the community level is accelerating progress towards the goal of universal access to diagnostic testing and effective antimalarial treatment. In 2011, a total of 44 countries worldwide were implementing interventions to provide ACTs at the community level.

Last update: 25 March 2014

Key documents

Share