What diseases are caused by the schistosoma species?

Schistosomiasis. The creatures entering, or trying to enter, the skin can produce katayama fever or just a rash. The eggs can cause pipestem cirrhosis of the liver, fibrosis of the bladder which may have squamous cancer supervene, or stroke / paralysis from brain / cord involvement. Embolization of the eggs is the world's commonest cause of "primary" pulmonary hypertension.