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Schistosoma mansoni: vitelline gland development in females from single sex infections

  • M. K. Shaw (a1)

Vitelline gland development and incomplete parthenogenesis in 65-week-old female Schistosoma mansoni from single sex infections is described. Vitelline gland development was restricted to the extreme posterior end of each worm and the developed vitelline lobules showed the normal sequence of development and maturation. The ovary, however, was always in an immature state. Egg production occurred although the eggs were non-viable.

The results suggest that, whilst male stimulation is not necessary to initiate vitelline gland development and egg production, it appears to be essential for the complete maturation of the ovary. The possible importance of ovarian maturation to the production of viable eggs is discussed.

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Journal of Helminthology
  • ISSN: 0022-149X
  • EISSN: 1475-2697
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