Figure 2.

Light microscopy time-lapse series of blebbing stages of Ceratonova shasta genotype IIR from ascites of rainbow trout. (A) Polarized blebbing (total time elapsed 105 s, images every 21 s), head arrows point to surface positions of the stages where blebs are expanding and rectracting, with physical overlap of several blebs simultaneously. (B) Non-polarized blebbing or circus movement (total time elapsed 20 s, images every 5 s): a bleb expansion initiated and propagated along the circumference of the sporogonic stage (with 2 mature spores), fully circumnavigating the parasite.