The ability to form clumps in the presence of platelets was assessed in parasite populations isolated from paediatric patients from Malawi. Parasites from patients with uncomplicated malaria (UM, n=12), severe malaria anemia (SMA, n=15), and cerebral malaria (CM, n=22) were incubated for different times with plasma with or without platelets. Results are expressed as mean ± SD of the percentage of PRBC that are associated with clumps. Assays were performed twice per patient sample.