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Related to redia: Metacercariae, cercariae


 [re´de-ah] (L.)
a larval stage of certain trematode parasites, which develops in the body of a snail host and gives rise to daughter rediae, or to the cercariae.


, pl.


(rē'dē-ă, -dē-ē),
Intramolluscan development stage of a digenetic trematode, following the primary sporocyst stage, which forms after penetration of the snail tissues by the miracidium. Rediae are produced from cells within the sporocyst, are liberated from the latter, and develop in the tissues of the host snail as elongated, saclike, muscular organisms with a mouth and gut. The rediae may produce one or a number of additional generations in the snail, but they ultimately produce the final development stage, the cercaria.
See also: sporocyst (1), miracidium.
[F. Redi, Italian physician, 1626-1697]


n. pl. re·diae (-dē-ē′)
A larva of certain trematodes that is produced within the sporocyst and that can give rise to additional rediae or to cercariae.


a larval stage of liver fluke which develops from the sporocyst larva. It possesses a mouth, suctional pharynx and simple gut, and gives rise to secondary rediae or to carcaria larvae.


F., Italian physician, 1626-1697.
redia - intramolluscan development stage of a digenetic trematode.
References in periodicals archive ?
On the histochemistry and ultrastructure of redia of Neophasis lageniformis (Lebour, 1910) (Trematoda, Acanthocolpidae).
Figure 6 is a mature redia with multiple live cercarial forms.
Caption: FIGURE 6: Redia stage with echinostome cercariae inside (upper half of the whole redial body shown) (CX21400x magnification).
After opening the mantle of the snails a large number of redia and cercaria and sporocyst larvae emerged outside the body of snails in Petri dish.
It has been reported that chlorophyll derivative chlorophyllin releases more singlet toxic oxygen when exposed to 650 nm and exhibits maximum toxicity against redia and cercaria larvae of F.
Garcia-Rupaya C.: Coordination short course ethics of research for dentistry students at Cayetano He redia Peruvian University, Lima Peru 2007-2008.