Schistosoma

Schistosoma is a kind of the animal kingdom containing of the flat worms which are responsible as parasites for the man of the Bilharziose S. the clinical signs lasting the phase of state are due to the formation of granulomes in fabrics.

Their intermediate hosts are fresh water molluscs (Bulin, Planorbe,… according to the species).

Morphology

The female is longer but thinner than the male, and she permanently saw in the channel gynécophore male. Both carry suction cups.

The eggs measure from 90 to 190 microns according to the species, with a final or side spur.

Cycle

The eggs are excrêtés in the saddles, their hull is dissolved in water for the release of the larva: the miracidium, which penetrates in the foot of mollusc. It is transformed there into sporocyst, which will give sporocysts wire (there is polyembryony), then in furcocercaire. This one leaves mollusc and contaminates the final host (Man,… according to species) while crossing the skin. It gains the lungs then, then the system carries, from where it will go in its specific body (according to the species).

See too

External references

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