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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 ?
Occurrence of coccidia (Caryospora neofalconis and Caryospora kutzeri) in birds of prey in falcon breeding facility in Milotice in the Czech Republic.
KEY WORDS: parasites, trematodes, branchial coccidia, rickettsiales-like organisms, hemocytic infiltration, razor clam Ensis macha (Pharidae)
Coccidia are often present in the digestive system of even healthy animals.
Coccidia are parasites that effect a wide range of turtle species worldwide.
The bottles were allowed to stand upright for 15 min to enable coccidia oocysts to float to the cover slip before examination under a light microscope at x 10 and x 40 magnifications.
2] indico que al menos un parasito se presento en una frecuencia diferente, encontrandose la Coccidia como el parasito de mayor prevalencia (93%), seguido por Ascaridia (12%), Trichuris (5%), Heterakis (3%), Tetrameres (2%), Amidostomum (1%), Raillietina (1%) y Toxocara (1%).
Short Report: Presence of Enterocytozoon bieneusi associated with intestinal coccidia in patients with chronic diarrhea visiting an HIV center in Haiti.
Unfortunately, the term coccidia is inclusive of many parasitic protozoa.
Key aspects of coccidia associated with diarrhea in HIV patients.
They were then given a challenge infection with live coccidia.