The development of the mother sporocyst and the differentiation of the daughter sporocyst ofSchistosoma mansoni inBiomphalaria pfeifferi are described. The tegumental structure of the mother sporocyst, consisting of an outer layer connected to internally situated nucleated cell bodies, forms extensions which enwrap the germinal cells. The parenchyma cells, in which the germinal cells were embedded before, degenerate. When daughter sporocyst embryos develop from germinal cells they are enveloped by a primitive epithelium which is formed by fusion of the extensions of the tegumental structure of the mother sporocyst. Somatic cells located peripherally in the developing daughter sporocyst expand and coalesce beneath the primitive epithelium to form the future outer layer of the tegumental structure of the daughter sporocyst. The primitive epithelium degenerates, the newlyformed layer looses its nuclei, and becomes connected to internally situated nucleated cell bodies. Further developments in the tegumental structure of the daughter sporocyst include the formation of microvillus-like projections, a surface coat, spines, and a basement membrane.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Basch, P.F., DiConza, J.J.: In vitro development ofSchistosoma mansoni cercariae. J. Parasitol.63, 245–249 (1977)
Cheng, T.C., Bier, J.W.: Studies on molluscan schistosomiasis: an analysis of the development of the cercaria, ofSchistosoma mansoni. Parasitology64, 129–141 (1972)
Etges, F.J., Carter, O.S., Webbe, G.: Behavioral and developmental physiology of schistosome larvae as related to their molluscan hosts. Ann. N.Y. Acad. Sci.,266, 480–496 (1975)
Hansen, E.L.: Secondary daughter sporocysts ofSchistosoma mansoni: their occurrence and cultivation. Ann N.Y. Acad. Sci.266, 426–436 (1975)
Hansen, E.L., Perez-Mendez, G.: Scanning electron microscopy ofSchistosoma mansoni daughter sporocysts. Int. J. Parasitol.2, 174 (1972)
Hockley, D.J.:Schistosoma mansoni: the development of the cercarial tegument. Parasitology64, 245–252 (1972)
Køie, M.: On the histochemistry and ultrastructure of the daughter sporocyst ofCercaria buccini Lebour, 1911. Ophelia9, 145–163 (1971)
Køie, M.: Electron microscopical observations of defence mechanisms against daughter sporocysts in a prosobranch gastropod. Symp. Deutsche Gesellschaft Parasitologie, Mollusken als Zwischen-wirte, Abstract in Zbl. Bakt. Hyg., I Abt., Ref. 263, 206 (1979), Würzburg 1979
Krupa, P.L., Lewis, L.M., Del Vecchio, P.:Schistosoma haematobium inBulinus guernei electron microscopy of hemocyte-sporocyst interactions. J. Invertebr. Pathol.30, 35–45 (1977)
Lengy, J.: Studies onSchistosoma bovis (Sonsino 1876) in Israel. I. Larval stages from egg to cercaria. Bull. Res. Counc. Israel10E, 1–36 (1962)
Matricon-Gondran, M.: Etude ultrastructurale des récepteurs sensoriels tégumentaires de quelques trématodes digénétiques larvaires. Z. Parasitenkd.35, 318–333 (1971)
Meuleman, E.A.: Host-parasite interrelationships between the freshwater pulmonateBiomphalaria pfeifferi and the trematodeSchistosoma mansoni. Neth. J. Zool.,22, 355–427 (1972)
Meuleman, E.A., Holzmann, P.J.: The development of the primitive epithelium and true tegument in the cercaria ofSchistosoma mansoni. Z. Parasitenkd.45, 307–318 (1975)
Meuleman, E.A., Lyaruu, D.M., Khan, M.A., Holzmann, P.J., Sminia, T.: Ultrastructural changes in the body wall ofSchistosoma mansoni during the transformation of the miracidium into the mother sporocyst in the snail hostBiomphalaria pfeifferi. Z. Parasitenkd.56, 227–242 (1978)
Oliver, L., Mao, C.P. The early larval stages ofSchistosoma mansoni Sambon, 1907 in the snail hostAustralorbis glabratus (Say, 1818). J. Parasitol.35, 267–275 (1949)
Pan, C.T.: Studies on the host-parasite relationship betweenSchistosoma mansoni and the snailAustralorbis glabratus. Am. J. Trop Med. Hyg.14, 931–976 (1965)
Rodewald, R., Karnovsky, M.J.: Porous substructure of the glomerular slit diaphragm in the rat and mouse. J. Cell Biol.60, 423–433 (1974)
Schutte, C.H.J.: Studies on the South African strain ofSchistosoma mansoni-Part 1: Morphology of the miracidium. S. Afr. J. Sci.70, 299–302 (1974a)
Schutte, C.H.J.: Studies on the South African strain ofSchistosoma mansoni-Part 2: The intramolluscan larval stages. S. Afr. J Sci.70, 327–346 (1974b)
Smith, J.H., Chernin, E.: Ultrastructure of young mother and daughter sporocysts ofSchistosoma mansoni. J. Parasitol.60, 85–89 (1974)
Wilson, R.A.: Fine structure of the tegument of the miracidium ofFasciola hepatica L. J. Parasitol.55, 124–133 (1969)
About this article
Cite this article
Meuleman, E.A., Holzmann, P.J. & Peet, R.C. The development of daughter sporocysts inside the mother sporocyst ofSchistosoma mansoni with special reference to the ultrastructure of the body wall. Z. Parasitenkd. 61, 201–212 (1980). https://doi.org/10.1007/BF00925512
- Schistosoma mansoni
- Mother sporocyst
- Daughter sporocyst
- Biomphalaria pfeifferi