Swimmers' itch and waterfowl management.
D000818:Animals; D001717:Birds / Q000469:parasitology*; D002170:Canada; D003872:Dermatitis / Q000453:epidemiology*; D006801:Humans; D012876:Skin Diseases, Parasitic / Q000453:epidemiology*; D012908:Snails / Q000469:parasitology; D013550:Swimming; D014481:United States; D014876:Water Pollution