Cercarial Dermatitis

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Abstract
Cercarial dermatitis or “swimmers’ itch” is a maculopapular skin eruption associated with the penetration of the skin by cercaria of certain species of nonhuman schistosomes. It is globally distributed and affects those who work or play in fresh and salt water. The etiology and epidemiology of the disease are similar to that of human schistosomiasis (bilharziasis). The trematode parasite passes through a life cycle that involves both warm-blooded and molluscan hosts. The clinical manifestations of “swimmers’ itch” are principally associated with an intensely pruritic dermatitis that lasts five to ten days and becomes more severe with subsequent exposure. Prevention is directed toward control of the molluscan hosts and their supporting environment. Treatment is symptomatic.