title: Observations on the changes in prevalence of S. haematobium and S. mansoni infections in the Nile Delta Region, Egypt.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004534:Egypt; D005260:Female; D006801:Humans; D008297:Male; D012548:Schistosoma haematobium; D012550:Schistosoma mansoni; D012552:Schistosomiasis / Q000453:epidemiology*; D013997:Time Factors