miracidium การใช้

• The miracidium penetrates the soft tissues of the snail, where it sporocyst.
• Following this, a miracidium hatches, which swims to find a mollusc host.
• Some eggs may be swallowed by a snail and hatch into larva ( miracidium ).
• The eggs enter the water, and hatch into a miracidium larva within 2 weeks.
• This system of asexual reproduction allows for an exponential multiplication of cercaria individuals from one miracidium.
• The parasite s eggs hatch in the water and the miracidium invades the foot of the snails.
• In the first intermediate host, the miracidium undergoes asexual reproduction for several weeks, which includes cercariae.
• In the presence of open water, the eggs hatch and the miracidium stage of life is reached again.
• The miracidium develops into a sporocyst, which in turn house the asexual reproduction of redia, the next stage.
• Eggs in a wet environment hatch into miracidia in 9 14 days . The miracidium grows into the sporocyst stage.
• Once inside of the snail body, the miracidium hatches from the egg, and parasitically grows inside of the snail.
• A trematode infects a snail with a miracidium larva that either swims to infect the snail, or hatches after the snail ingests the trematode egg.
• After post-ingestion hatching or penetration of the snail, the miracidium metamorphoses into a simple, sac-like " mother sporocyst ".
• The larvae ( or miracidium ) drill through the wall of the gut and settle in its digestive tract, where they develop into a juvenile stage.
• Embryonated eggs are passed into an aquatic environment ( fresh or brackish water ) each containing a fully developed larva, called a " miracidium ".
• Alternatively, eggs may hatch in water to release an actively swimming, ciliated larva, the miracidium, which must locate and penetrate the body wall of the snail host.
• The water snail is the first intermediate host in which a miracidium ( an embryonated egg discharged in stool ) goes through its developmental stages ( sporocyst, rediae and cercariae ).
• This aids the " Clonorchis " in reproduction, because it enables the miracidium to capitalize on one chance occasion of passively being eaten by a snail before the egg dies.
• One month-or more with cooler ambient temperatures-after a miracidium has penetrated into the snail, hundreds to thousands of cercariae of the same sex begin to be released through special areas of the sporocyst wall.
• The eggs hatch into a miracidium stage, which develops into multiple brooding " L . saxatilis " generally move only to avoid being left above water by the tide while non-brooding ( including castrated ) periwinkles are more active.