alexa Schistosomiasis and water resources development: systematic review, meta-analysis, and estimates of people at risk.
Infectious Diseases

Infectious Diseases

Journal of Infectious Diseases and Diagnosis

Author(s): Steinmann P, Keiser J, Bos R, Tanner M, Utzinger J

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Abstract An estimated 779 million people are at risk of schistosomiasis, of whom 106 million (13.6\%) live in irrigation schemes or in close proximity to large dam reservoirs. We identified 58 studies that examined the relation between water resources development projects and schistosomiasis, primarily in African settings. We present a systematic literature review and meta-analysis with the following objectives: (1) to update at-risk populations of schistosomiasis and number of people infected in endemic countries, and (2) to quantify the risk of water resources development and management on schistosomiasis. Using 35 datasets from 24 African studies, our meta-analysis showed pooled random risk ratios of 2.4 and 2.6 for urinary and intestinal schistosomiasis, respectively, among people living adjacent to dam reservoirs. The risk ratio estimate for studies evaluating the effect of irrigation on urinary schistosomiasis was in the range 0.02-7.3 (summary estimate 1.1) and that on intestinal schistosomiasis in the range 0.49-23.0 (summary estimate 4.7). Geographic stratification showed important spatial differences, idiosyncratic to the type of water resources development. We conclude that the development and management of water resources is an important risk factor for schistosomiasis, and hence strategies to mitigate negative effects should become integral parts in the planning, implementation, and operation of future water projects. This article was published in Lancet Infect Dis and referenced in Journal of Infectious Diseases and Diagnosis

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