Abstract
Various plant extracts were tested for toxicity to the snail Biomphalaria pfeifferi, the intermediate host of Schistosoma, the causal agent of Bilharzia. Agave sisalana, Anacardium occidentale, Annona senegalensis, Balanites aegyptiaca, Canna indica, Chenopodium ambrosioides, Phytolacca dodecandra, Polygonum senegalense, Sesbania sesban, Simarouba vesicolor and Solanum lycopersicum are effective to different degrees. Phytolacca dodecandra, Balanites aegyptiaca and Agave sisalana have a toxic effect with the lowest dose (10 mg of powder/1).
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