Prevalence of intestinal helminth infections in 6-year-old children in 18 municipalities of Puerto Rico.
D002648:Child; D005260:Female; D006373:Helminthiasis / Q000453:epidemiology*; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology*; D008297:Male; D011647:Puerto Rico; D012424:Rural Population; D012572:School Health Services