Which of the following Schistosoma is seen in the veins of the bladder and Pelvic Organs?
Schistosoma japonicum
Schistosoma mansoni
Schistosoma haematobium
Schistosoma intercalatum
The schistosome life cycle begins after mating in the hepato-poal circulation when the conjoined couple uses their suckers to ascend the mesenteric vessels against the flow of blood. Guided by unknown stimuli, S japonicum enters the superior mesenteric vein, eventually reaching the venous radicals of the small intestine and ascending colon; S mansoni and S haematobium are directed to the inferior mesenteric system. The destination of the former is the descending colon and rectum; the latter, however, passes through the hemorrhoidal plexus to the systemic venous system, ultimately coming to rest in the venous plexus of the bladder and other pelvic organs.Ref: Sherris microbiology; 6th edition; Page no: 904
parasitology