The effect of Schistosoma mansoni infection on child morbidity in the state of Bahia, Brazil. I--Analysis at the ecological level.
D000293:Adolescent; D001938:Brazil; D002648:Child; D002675:Child, Preschool; D006305:Health Status Indicators; D006529:Hepatomegaly / Q000453:epidemiology*; D006801:Humans; D010270:Parasite Egg Count; D012552:Schistosomiasis / Q000175:diagnosis / Q000453:epidemiology*; D013163:Splenomegaly / Q000453:epidemiology*