Schistosomiasis of the urogenital system

Schistosomiasis of the urogenital system is mainly caused by Schistosomiasis aegypti. Schistosoma japonicum in Japan is the main disease. Eggs are mostly deposited in the testicular sheath, scrotal wall, epididymis, spermatic cord, and corpus cavernosum. Its pathological feature is that the eggs stimulate the host's immune response, causing the eggs to granuloma and damage the organs. Schistosomiasis of the male genital system of the urinary system mainly occurs in the bladder, and it is rare in affected persons of the kidney and the genital system. Schistosomiasis of the bladder is an adult bladder disease caused by schistosomiasis parasitizing in the blood vessels of the human bladder and pelvic venous plexus. Eggs are deposited under the mucosa of the bladder and near the urogenital organs. Eggs cause eosinophilic granuloma. It is most commonly found in the triangular region of the bladder. The entire bladder wall is invaded during chronic infection, fibrosis and scar formation, and the bladder volume becomes smaller, causing bladder contracture. Lesions involve ureteral obstruction or bladder ureteral reflux. The main pathological change is worm egg granuloma, which often occurs in the triangular region of the bladder, manifested by thickening of the bladder mucosa and ulcers.