Fig. 3From: Scanning electron microscopic observation of the in vitro cultured protozoan, Perkinsus olseni, isolated from the Manila clam, Ruditapes philippinarumMicroscopic images of P. olseni zoospores transforming into trophozoites and schizogony observed under a light microscope. a. Zoospores (arrowhead) released to the medium and transformed into trophozoites (arrow) on the third day; scale bar = 50 μm. b. Clusters of sibling merozoites (arrow) released from a schizont on the fifteenth day; scale bar = 20 μmBack to article page