When they get into freshwater, the miracidium
is released from the egg.
Some of the eggs were enclosed by miracidium
, which were surrounded by degenerated red blood cells and few connective tissue cells.
Once the egg encounters fresh water, the developing larva hatches, releasing a single miracidium
The eggs of schistosomes are nonoperculate, possess a spine, and contain a miracidium
hatching test after concentration of eggs with a nylon tissue bag was used.
mansoni egg and its miracidium
in its mammalian host, in stools, free-swimming in water, and penetrating their snail intermediate host was reported by J.
The eggs hatch in water and release a free-swimming miracidium
, whose objective in life is to find and penetrate an appropriate snail in which to develop.
Within 30 to 45 days, miracidium
grows into worm, which can lay 200 to 2,000 eggs per day for an average of 5 years.
The eggs undergo a slow development involving a dispersing phase during 10 days before reaching the miracidium
stage that infects molluscs.
Once inside the snail host, each miracidium
develops a "sporocyst," which may divide and produce other sporocysts.
On exposure to water, the eggs hatch and liberate a miracidium
that infects a suitable molluscan intermediate host.