Figure 4

Comparison of platelet-mediated clumping frequencies among laboratory strains of P. falciparum. The platelet-mediated clumping phenotype was analysed in the P. falciparum laboratory strains C10, 3D7 and Dd2, and their clumping frequencies compared to HB3. All the assays were performed at 10% Ht and 1% Pt. Three replicates of each experiment, done on different days and with platelet-rich plasma from different donors were performed and gave very similar results, therefore a representative experiment for each strain is shown. The clumping frequency values and ranges were obtained as described for Figure 2. Clumping frequency values in the graphs are the mean and standard deviation of three wet preparations counted from each time point.