Coccidia


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Coccidia

[käk′sid·ē·ə]
(invertebrate zoology)
A subclass of protozoans in the class Telosporea; typically intracellular parasites of epithelial tissue in vertebrates and invertebrates.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Coccidia

 

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.

REFERENCE

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

V. A. DOGEL’

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The location of the major lesions gives a good indication of the species of coccidia concerned.
Besnoitia wallacei of cats and rodents: with a reclassification of other cyst-forming isosporoid coccidia. J.
Like coccidia, giardia oocysts are tough--not killed by freezing or even the chlorination carried out by municipal water-treatment plants, as reported by the Cornell Feline Health Center.
This may have facilitated the growth of GIN and coccidia in the parasitized goats.
The other parasites with high prevalence included coccidia (26.9%) and Strongyloides ransomi (25.9%).
Williams, "Tracing the emergence of drug-resistance in coccidia (Eimeria spp.) of commercial broiler flocks medicated with decoquinate for the first time in the United Kingdom," Veterinary Parasitology, vol.
Consequently, it can be predicted that both species of coccidia will be found in other populations of the round-tailed ground squirrel.