Comparative studies for development of Schistosoma mansoni sporocysts in Puerto Rican and Brazilian Biomphalaria glabrata

Yuzuru Iwanaga, Masanobu Tanabe, Tsutomu Takeuchi

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1 Citation (Scopus)


The development of sporocysts of Schistosoma mansoni was monitored in pigmented and albino Biomphalaria glabrata from Puerto Rico and Brazil. The snails were exposed individually to 20 miracidia, and sporocysts were allowed to develop for 3 to 12 weeks. Most of the immature sporocysts were found in the seminal receptacle sac and vas deferens during development. In contrast, mature daughter sporocysts were detected everywhere except in the foot at 12 weeks after exposure to the miracidia. It was found that mature daughter sporocysts formed more rapidly in the pigmented than in the albino snails, but no difference was observed in the formative time between the same types of Puerto Rican and Brazilian snails. It seems likely that there is a correlation between the infection rate and the time required for formation of mature daughter sporocysts in B. glabrata.

Original languageEnglish
Pages (from-to)125-128
Number of pages4
JournalHiroshima Journal of Medical Sciences
Issue number3
Publication statusPublished - 2000 Sep 1



  • Biomphalaria glabrata
  • Schistosoma mansoni
  • Sporocysts

ASJC Scopus subject areas

  • Medicine(all)

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