Swimmer's itch is an unpleasant, itchy rash caused by the larval stage of flatworms parasites, called schistosomes (Shiss-toe-soams). These microscopic worms are found in many lakes and pond habitated by ducks and snails. They occur usually in the warm summer months when beaches are most heavily used.
SWIMMER'S ITCH
Meaning of SWIMMER'S ITCH in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012