African women living with HIV have an effective option to prevent malaria during pregnancy

13 January 2024

The combination of two antimalarial drugs (DHA-PPQ) reduces the risk of malaria infection and disease in pregnant women on HIV treatment, according to results from the MAMAH trial

In women living with HIV, preventive treatment with DHA-PPQ is a safe and effective strategy to prevent malaria during pregnancy, according to the final results of MAMAH, a clinical trial funded by the EDCTP and coordinated by the Barcelona Institute for Global Health (ISGlobal), an institution supported by “la Caixa” Foundation. The study, published in the Lancet Infectious Diseases, could help protect the health of the estimated one million pregnant women who suffer from a double infection with malaria and HIV every year.

Pregnant women are particularly vulnerable to malaria infection. Hence the recommendation to offer preventive treatment (IPTp) based on sulphadoxine and pyrimethamine (SP) to pregnant women living in malaria-endemic areas. The problem is that these drugs are incompatible with co-trimoxazole (CTX), an antibiotic given to people with HIV to prevent bacterial infections.

“This means that the population most vulnerable to malaria infection and its consequences, namely pregnant women living with HIV, are also the least protected,” explains ISGlobal researcher Raquel González, technical coordinator of the MAMAH project, led by Clara Menéndez, director of ISGlobal’s Maternal, Child and Reproductive Health Initiative.

The aim of the project was to evaluate the safety and efficacy of two other drugs: dihydroartemisinin and piperaquine (DHA-PPQ) to prevent malaria during pregnancy in women living with HIV. The research team conducted the trial in Gabon and Mozambique with more than 600 pregnant women taking CTX in addition to antiretroviral treatment for HIV. One group of pregnant women received DHA-PPQ and the other group received a placebo.

Lower risk of malaria infection and disease

Although there was no significant difference in malaria infection at the time of delivery, women in the DHA-PPQ group had a significantly lower risk of developing clinical malaria throughout pregnancy (almost eight times lower than the placebo group) and also a lower risk (almost half) of becoming infected. DHA-PPQ was effective in women taking different antiretroviral treatments. No serious side effects were observed, and DHA-PPQ had no effect on mother-to-child transmission of HIV.

“We show that preventive treatment with DHA-PPQ is effective even in low malaria transmission settings,” says González. “Adding this strategy to malaria control tools could significantly improve the health of thousands of mothers and their babies, especially in sub-Saharan Africa, a region where an estimated one million women living with HIV are infected with malaria during pregnancy every year,” she adds.

“We congratulate the MAMAH team on these important results in the field of malaria research, and, in particular, in providing better health to pregnant women living with HIV in malaria-endemic areas” says Montserrat Blázquez-Domingo, EDCTP Senior Project Officer. “This study underlines the value of collaborative research that EDCTP supports and our focus on priority infectious disease affecting sub-Saharan Africa in populations often excluded from clinical trials – such as pregnant women.”

The MAMAH study (grant number RIA2016MC-1613-MAMAH) is part of the EDCTP2 Programme supported by the European Union, with cofunding from the German Federal Ministry of Education and Research (BMBF).

About ISGlobal

The Barcelona Institute for Global Health, ISGlobal, is the fruit of an innovative alliance between the ”la Caixa” Foundation and academic and government institutions to contribute to the efforts undertaken by the international community to address the challenges in global health. ISGlobal is a consolidated hub of excellence in research that has grown out of work first started in the world of health care by the Hospital Clínic and the Parc de Salut MAR and in the academic sphere by the University of Barcelona and Pompeu Fabra University. Its working model is based on the generation of scientific knowledge through Research Programmes and Groups, and its translation through the areas of Training and Analysis and Global Development. ISGlobal has been named a Severo Ochoa Centre of Excellence and is a member of the CERCA system of the Generalitat de Catalunya.


The European & Developing Countries Clinical Trials Partnership (EDCTP) is a public–public partnership between 15 European and 28 African countries, supported by the European Union. EDCTP’s vision is to reduce the individual, social and economic burden of poverty-related infectious diseases affecting sub-Saharan Africa. EDCTP’s mission is to accelerate the development of new or improved medicinal products for the identification, treatment and prevention of infectious diseases, including emerging and re-emerging diseases, through pre- and post-registration clinical studies, with emphasis on phase II and III clinical trials. Our approach integrates conduct of research with development of African clinical research capacity and networking. For more information, please visit

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