Figure 2From: Whole plant extracts versus single compounds for the treatment of malaria: synergy and positive interactionsIsobolograms of the in vitro interaction of curcumin with methanol extracts of Andrographis paniculata (B) and Hedyotis corymbosa (C), in a chloroquine-resistant strain of P. falciparum (MRC-pf-303) [41]. The straight diagonal line represents the null hypothesis if there were no interaction.Back to article page