Giardiasis in travellers and their families.
D000293:Adolescent; D000328:Adult; D004196:Disease Outbreaks; D005873:Giardiasis / Q000453:epidemiology* / Q000235:genetics / Q000635:transmission; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology* / Q000235:genetics / Q000635:transmission; D014195:Travel; D014586:USSR; D014481:United States