RESUMEN
The search for new treatments against malaria has a highpriority in the fight to bring this disease under control. The aim of this study was to assess the therapeutic potential of extracts of plants selected on the basis of ethnobotanical information collected from Cuban traditional medicine. Extracts from six plants (Bambusavulgaris, Parthenium hysterophorus, Melaleuca leucadendron, Indigofera suffruticosa, Artemisia absinthium, Simarouba glauca) were tested for their invitro effect against the F32/Tanzania strain ofPlasmodium falciparum. S. glauca, P. hysterophorus, M.leucadendron and A. absinthium exhibited minimum inhibitory concentrations (MIC) in the range from 3.1to 50 g/mL, while B. vulgaris and I. suffruticosa showed negative activity against this strain. The highest in vivo activities against Plasmodium berghei NK65 were shownby A. absinthium, with a 65.9% reduction in parasitemia at a dose of 500 mg/kg, M. leucadendron, with 50%reduction at 250 mg/kg, and S. glauca, with 43.2%reduction at 100 mg/kg. The less toxic extracts wereA. absinthium and M. leucadendron. These results demonstrate the antimalarial properties of some Cuban medicinal plants and pave the way to detailed researchon their active chemical constituents.