Selected frames taken from Movie S1 in the Supporting Material, showing optical trapping of a freshly released merozoite, with delivery to and invasion of a targeted erythrocyte. (Red arrow) Optical tweezers-directed movement. The merozoite of interest is shown before the application of a trapping force (0 s), upon delivery of the merozoite to a target cell (3 s), during the subsequent invasion process (20 s), and after the postinvasion echinocytosis of the invaded cell (80 s). To see this figure in color, go online.