Ultrastructure of the microsporidian from penaeus monodon

In this paper, the ultrastructure of the Microsporidian is described in detail, such as the spore wall, the polar filament, polaroplast, anchoring disc, posterior vacuole and so on. By observing the ultrastructure of Penarus monodon infected by the Microsporidian, we give some clear ultrastructure photographs of the Microsporidian, and outline the symptom and precluding measure of the Microsporidian disease.