[Observation on the ultrastructure of Spirometra mansoni plerocercoid].
Plerocercoids of Spirometra mansoni were collected from muscles of the frogs. Specimens were treated following the routine procedure, embedded, sliced and stained. The ultrastructure of plerocercoid was observed with transmission electron microscopy. It was found that the wall of plerocercoid consisted of tegument and parenchyma. Thornshape microtriches distributed over the outer surface of the tegument. Matrix zone had a lot of granular discoidal bodies, vesicles, mitochondria and endoplasmic reticulum. Most of the mitochondria were near the basal membrane. Parenchyma zone consisted of muscular layer, tegument cells, parenchymal cells, excretory system, and so on. Many cytoplasmic pathways of tegumentary cells stretch into muscular layer, suggesting that the tegument may be the absorptive site of nutrients.
Department of Parasitology, Guiyang Medical College, Guiyang 550004, China.
Gui-wen
GW
Tang
Yan
Y
Cheng
Xian-lin
XL
Liu
Ao-shuang
AS
Chang
D000818:Animals; D046529:Microscopy, Electron, Transmission; D013146:Spirometra / Q000648:ultrastructure*