Schistosoma haematobium

From Biology-Online Dictionary | Biology-Online Dictionary



A schistosome species that causes schistosomiasis haematobium, and is found in Africa, Middle East, and southern Europe


Schistosoma is a genus belonging to class Trematoda of phylum Platyhelminthes. Members of this genus are commonly called schistosomes or blood flukes. One of the distinctive features of schistosomes is their sexual dimorphism such that the males are females differ in size or length and the males have a gynecophore to carry their female mate. The genus includes species such as S. japonicum, S. spindale, S. haematobium, S. indicum, S. intercalatum, S. malayensis, S. mansoni, and S. mekongi.

S. haematobium is a schistosome species that is found mainly in Africa, Middle East, and the southern Europe. The adult males reach about 10 mm in length and the adult females, about 15mm. Both of them have a strong oral sucker and a small posterior ventral sucker. The adult males have a gynecophore where females reside.1

S. haematobium is the causative agent of schistosomiasis haematobium. Its intermediate hosts are Bulinus spp. and Physopsis spp. The worm (cercarial stage) leaves the snail and enters a definitive host, particularly humans. Within its host it transforms into schistosomulum (a schistosome larva) that spreads, grows, and matures into adult worms. From the liver, the species then travels to the bladder (venus plexus) where they begin to produce eggs.1

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1 Trivedi, J. 2003. "Schistosoma haematobium" (On-line), Animal Diversity Web. Accessed at