Figure 1

Quantum dot (QD) labelling on P. falciparum- infected erythrocytes showing that only late-stage iRBCs are labelled. Early-stage (ring) iRBCs (A) are not labelled by the QD, while the late-stage trophozoite (B) and segmented schizont (C) iRBCs are both labelled. The parasites were stained with Hoechst 33324 (in red, first column from the left) and PCQD (in green, second column). Phase contrast images (third column) and merged images (fourth column) are also shown. Bars, 5 mm.