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Seasonal abundance of trematode cercariae in Bulinus truncatus in a small focus of schistosomiasis in the Nile Delta.

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Bulletin of the World Health Organization

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      Abstract

      Bulinus truncatus was most numerous from June to August, and echinostome cercariae, present in 19.3% of snails, were the most prevalent of the 4 types of trematode cercariae found. The echinostomes occurred throughout the year, other cercariae only in certain months. Double infections were uncommon. The findings suggest that echinostome cercariae exercise some biological control of Schistosoma haematobium in the area studied.

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      Author and article information

      Journal
      Bull. World Health Organ.
      Bulletin of the World Health Organization
      0042-9686
      0042-9686
      1972
      : 47
      : 3
      4539823
      2480729

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