participates in located in Schistosoma mansoni worm Schistosoma mansoni 7 week worm A Schistosoma mansoni worm is the mature form of Schistosoma mansoni and capable of sexual reproduction, which is found in the small inferior mesenteric blood vessels surrounding the large intestine of the mammal host 7 weeks after infection of the mammalian host. Flora Logan Anna Protasio Jie Zheng Chris Stoeckert S. mansoni 7 week worm Schistosoma mansoni 7 week worm stage Mammalia mesenteric vein Mammalia intestine