Schistosoma mansoni is a trematode flatworm, one of a number of species of schistosome causing the parasitic disease schistosomiasis, or Bilharzia. Schistosomiasis affects over 200 million people worldwide.
Drug treatment, snail control, improved sanitation and health education are being used to try and control schistosomiasis.
Larval forms of Schistosoma mansoni penetrate human skin and develop into adult schistosomes living in blood vessels surrounding the human intestine.
The male and female form a reproductive pair, with the female held by the male within a groove. Females release eggs, into the blood vessels which are
A pair may live for years within the host, the female producing thousands of eggs.
The Schistosoma mansoni reproductive pair can live for several years within their host. Find out more about the lifecycle of this parasitic organism, from the laying their eggs through to the stage where Schistosoma mansoni can infect humans.
Discover the regions of the world that this parasitic organism can be found in.
Read about schistosomiasis, how it can result from Schistosoma mansoni, the process by which it develops and how it is treated.
Get reference material for Schistosoma mansoni.
A map showing the global distribution of schistosomiasis the disease caused by
Schistosoma mansoni. © CDC http://wwwnc.cdc.gov/
Mature adult Schistosoma mansoni release eggs, into the blood vessels.
The eggs in the intestine pass out of the body with faeces and if they come into contact with fresh water, hatch into a free-living life-cycle stage called the miracidium.
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A Schistosoma mansoni male/female pair. The female is held by the male in a groove along its body.
Schistosoma mansoni egg. The egg has a characteristic lateral spine. The miracidium stage can be seen within the egg. © A Emery
The miracidium is a short-lived free-swimming stage of Schistosoma mansoni that infects snails. © A Emery
S. mansoni miracidia infect freshwater snails, which eventually leads to the cercaria, the stage that infects humans
The cercaria is the life-cycle stage of Schistosoma mansoni infecting humans. © A Emery
Schistosome researcher and Culture Facility Laboratory Manager, responsible for molecular collections development.
Our scientists are involved in researching the ways schistosomiasis is transmitted and treatment programmes to help those in affected regions.