Giardiasis: a community problem.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005243:Feces / Q000469:parasitology; D005873:Giardiasis / Q000635:transmission*; D006801:Humans; D007196:Indiana; D007223:Infant; D008875:Middle Aged