A comparative study of vitelline cell in schistosoma mansoni schistosoma haematobium schistosoma japonicum and schistosoma mattheei
Erasmus, D.A.; Popiel, I.; Shaw, J.R.
Parasitology 84(2): 283-288
ISSN/ISBN: 0031-1820 Accession: 004559793
A comparison is given of the ultrastructure of the vitelline cell in S. mansoni, S. haematobium, S. japonicum and S. mattheei. Four stages in development of the vitelline cell were categorized: Stage 1, the undifferentiated cell; Stage 2, the developing cell showing the beginning of synthetic activity: Stage 3, the developing cell showing active protein synthesis; and Stage 4, the fully mature vitelline cell. These stages in development were defined morphologically and Stages 1, 2 and 3 were similar in all 4 spp. Lipid present in the Stage 4 cells of all species appeared earlier at Stage 3 in S. haematobium and S. mattheei. There were several differences as to the intercellular inclusions of the Stage 4 cells, the most marked of these being the absence of calcareous corpuscles from S. japonicum as compared with the other 3 spp.