Fig. 3

Microscopic 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 μm