title: Socioeconomic changes and reduction in prevalence of schistosomiasis in Puerto Rico.
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D011647:Puerto Rico; D012552:Schistosomiasis / Q000453:epidemiology*; D012722:Sewage; D012959:Socioeconomic Factors; D014876:Water Pollution; D014881:Water Supply
chemical_list: D012722:Sewage