摘要：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. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (542K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 420 421 422
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