Differential interference contrast (DIC) light micrograph and scanning electron micrographs (SEM) showing the general morphology of the gametocyst from the termite hindgut. (a) DIC light micrograph of gametocyst showing initial stage of gametocyst formation in which individual gamonts associate (arrow) to form a spherical structure. (b) SEM of gametocyst showing the surface ultrastructure. (c) A mechanically ruptured gametocyst. Scale bars (a) 200 μm; (b) 50 μm; (c) 100 μm.