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Schistosomiasis is a flatworm transmitted from freshwater snails to humans in the tropics. In addition to this infectious disease, tropical developing countries are faced with malnutrition. We propose to alter pesticide and compost use to reduce schistosomiasis and maintain or even improve crop production.
We propose two types of manipulations. Bottom-up manipulations will affect snail resources, whereas top-down manipulations will affect snail predators. For the bottom-up manipulations, we will clear shistosoma infections in school children, then remove the primary habitat for snails, the submerged macrophyte Ceratophyllum demersum (with proper unmanipulated controls), compost it, apply it to crops, and then quantify reinfection rates and crop yields. The second bottom-up manipulation will be to clear shistosoma infections in school children, apply three agrochemical treatments (status quo control, shift to lower risk herbicides, or eliminate herbicides and fertilizers), and then quantify reinfection rates and crop yields. Farmers will be compensated for any loss in yields. For the top-down manipulations, every village will receive prawns that depredate snails. We will clear shistosoma infections in school children, apply three agrochemical treatments (status quo control, shift to lower risk insecticides that don't kill prawns, or eliminate insecticides), and then quantify reinfection rates and crop yields. Farmers will be compensated for any loss in yields.
Espoir Pour La Santé (EPLS)
University of South Florida
Published on BioPortfolio: 2017-06-15T01:23:21-0400
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A study in which observations are made before and after an intervention, both in a group that receives the intervention and in a control group that does not.
A study that uses observations at multiple time points before and after an intervention (the "interruption"), in an attempt to detect whether the intervention has had an effect significantly greater than any underlying trend over time.
An order of bottom fishes with short, small, spinous dorsal fins. It is comprised of one family (Batrachoididae) and about 70 species.
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