The skin may be infested by the various species of Schistosoma in the same way as other organ systems. Many times skin lesions are overlooked because they are often of little importance symptomatically. Then, too, with serious systemic involvement lesions in the skin are of less importance. Lesions in the skin are not rare, and effort should be made to recognize them. Many times they are the presenting sign of a serious systemic involvement and occasionally they afford the earliest opportunity to make a diagnosis.
The usual life cycle of the schistosome involves a primary host in which ova containing miracidia are formed, and a secondary host in which the miracidia develop into cercariae which infest man.* Usually the secondary host is an organism like the snail, and the opportunity for infestation is provided by contact with water containing the cercariae. In respect to symptoms in