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(invertebrate zoology)
A subclass of protozoans in the class Telosporea; typically intracellular parasites of epithelial tissue in vertebrates and invertebrates.



an order of one-celled animals of the class Sporozoa. There are approximately 1,000 species. They are intracellular parasites of the epithelial tissue primarily of the digestive organs of invertebrates (annelid worms, mollusks, and arthropods) and vertebrates. They look like small rounded cells with a bubble-shaped nucleus.

Almost every species of Coccidia parasitizes only one definite species of animal host. Most Coccidia exhibit regular alternation of asexual reproduction (schizogony), a sexual process, and sporogony. Asexual reproduction is absent only in the most primitive group—Protococcidiida (genus Eucoccidium). Spores keep the sporozoites viable outside the host’s body for several months, until the oocyst is swallowed by the animal host. The majority of species of Coccidia develop in one host. Some Coccidia have two—for example, members of the genus Aggregata undergo asexual reproduction (schizogony) in crabs and the sexual process and sporogony in gastropod mollusks. Coccidia are very widely distributed. Some cause coccidiosis.


Kheisin, E. M. Zhiznennye tsikly koktsidii domashnikh zhivotnykh. Leningrad, 1967.


References in periodicals archive ?
Faecal microscopy can be done to detect coccidian oocysts; however, it is not able to differentiate between T.
Coccidian parasites (Eucoccidia: Eimeriidae) in European ground squirrel (Spermophilus citellus L.
Effective diagnosis of infections caused by these coccidian parasites requires diagnostic tools to be timesaving, cost-effective, accurate, and sensitive.
a new coccidian parasite (Apicomplexa: Eimeriidae) from the American Robin (Turdus migratorius).
Eimerian coccidian are members of the suborder Eimeriina, and they are typically highly host-, organ- and tissue-specific.
es un protozoario coccidian intracelular que infecta el epitelio gastrico y respiratorio de los vertebrados; fue identificado por primera vez en la glandula gastrica de raton por Tyzzer en 1907 (3-6).
Cryptosporidium is a xeonous coccidian protozoa parasite found in at least 170 different species of ani- mals such as mammalians, birds, etc.
The present paper is a review of the sources and transmission mechanisms of Cyclospora cayetanensis, an emergent coccidian pathogen that causes endemic and epidemic diarrheal illness worldwide.
4) Also, we used of Sheather's flotation method and modified Ziehl-Neelsen staining technique for detection of coccidian parasites.
The problem we are talking about here is a disease cause Toxoplasmosis, a coccidian parasite (Toxoplasma gondii).