Prolonged latent schistosomiasis.
D012809:Colon, Sigmoid / Q000469:parasitology; D005243:Feces / Q000469:parasitology; D006801:Humans; D008136:Longevity; D008297:Male; D008875:Middle Aged; D012007:Rectum / Q000469:parasitology; D012549:Schistosoma japonicum / Q000302:isolation & purification / Q000502:physiology*; D012552:Schistosomiasis / Q000175:diagnosis*