title: Epidemic giardiasis. A continued elusive entity.
mesh_terms: D000293:Adolescent; D000328:Adult; D003120:Colorado; D004196:Disease Outbreaks / Q000175:diagnosis / Q000453:epidemiology*; D005872:Giardia / Q000302:isolation & purification; D005873:Giardiasis / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008875:Middle Aged; D014871:Water Microbiology