cercaria การใช้

• These embryos move to the brood sac and mature into cercaria.
• The cercaria either infects vertebrates through the skin or is ingested.
• The redia themselves house the asexual reproduction of free-swimming cercaria.
• The cercaria has two suckers : a ventral sucker and rounded subterminal sucker.
• Dragonflies are affected by three major groups of cercaria in a secondary host, a snail.
• This system of asexual reproduction allows for an exponential multiplication of cercaria individuals from one miracidium.
• Each cercaria has a chemosensory apparatus it must use to sniff out a tadpole within about 12 hours.
• They become infected when the larvae ( cercaria ) of the worm penetrates the flesh of the fish.
• The cercaria leaves the snail and encysts in the muscle of the connective tissue of fresh-water species.
• Once inside of the fish muscle, the cercaria create a protective metacercarial cyst with which to encapsulate their bodies.
• Bacteria " Neorickettsia risticii " was detected in cercaria from " Semisulcospira libertina " in Korea.
• In experimental infection of the mollusc " Helicorbis coenosus " miracidum develops into cercaria after 28 153 days of ingestion.
• In these groups, sexual maturity occurs after the cercaria penetrates the second host, which is in this case also the definitive host.
• The cercaria of " B . mytili " was described in 1935 occurring in " Mytilus edulis " in Wales.
• In its vertebrate host, the cercaria matures to an adult form, the fluke, and lays eggs that are discharged with the host feces or urine.
• It is hypothesised that the free cercaria in water bodies, accidentally, find and penetrate these animals as second intermediate host, where they encsyt as metacercaria.
• The motile cercaria larva is released by the first intermediate host, typically a snail, and parasitizes a second intermediate host, where it encysts into a metacercaria.
• These in turn undergo further asexual reproduction, ultimately yielding large numbers of the second free-living stage, the " cercaria " ( pl . cercariae ).
• The "'Bucephaloidea "'are a Bucephalus " because of the horn-like appearance of the forked tail ( furcae ) of its cercaria larva.
• The name " Bucephalus " meaning " ox head " was chosen because of the horn-like appearance of the forked tail ( furcae ) of its cercaria.