Where is Cercaria found?
A cercaria (plural cercariae) is the larval form of the parasite Trematode. It develops within the germinal cells of the sporocyst or redia. A cercaria has a tapering head with large penetration glands.
What is redia larva?
Definition of redia : a larval form of a digenetic trematode (such as a liver fluke) that is produced within a sporocyst, has a mouth, pharynx, and gut, and contains cells which give rise to other rediae or to cercariae — see also redial entry 3.
What is sporocyst larva?
A larval form of digenetic trematode (fluke) that develops in the body of its molluscan intermediate host, usually a snail; the sporocyst forms a simple saclike structure with germinal cells that bud off internally and develop into other larval types that continue this process of larval multiplication (considered to be …
How do you identify cercariae?
Several techniques are employed to differentiate the cercariae: using a vital stain to observe the pattern and number of internal gland cells, using silver nitrate to stain papillae on the tegument of the body and the tail of cercaria (chaetotaxy), or using Polymerase Chain Reaction (PCR) and sequencing to study gene …
What parasite causes Cercarial dermatitis?
Cercarial dermatitis is caused by penetration of the skin by avian schistosomal larval forms called cercariae. Snails infected with schistosome (blood fluke) species shed the infective cercariae into the water. The cercariae penetrate the wet skin of warm-blooded animals, including people.
How do you identify miracidium?
The miracidia are oval-shaped and their body is almost entirely covered in cilia except for the most anterior portions, taken up by “apical papilla”. The miracidia have four papillae on each side, which contain sensory hairs. They each have an apical gland that leads to the apical papilla.
What is Rhabditiform larva?
Rhabditiform larva is characteristic to nematodes (roundworm). Ascaris is a roundworm. Tapeworm larval stage is called as coenuri; Hydra (cnidarian) lack any larval stage while parenchymula is the free-swimming flagellated larval stage of Leucosolenia (Porifera).
Is redia a word?
noun, plural re·di·ae [ree-dee-ee]. Zoology. a cylindrical larval stage of some trematodes, produced by a sporocyst and giving rise to daughter rediae or to cercariae.
What is sporocyst in zoology?
Zoology. a. a saclike larval stage of many trematodes which produces rediae by asexual development from germinal cells. b. a protective cyst produced by some protozoans before sporulation, or a protozoan in such encystment.
