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Home > D. General pathology > Infectious diseases > Cocccidia


Wednesday 26 April 2017


Coccidia (Coccidiasina) are a subclass of microscopic, spore-forming, single-celled obligate intracellular parasites belonging to the apicomplexan class Conoidasida.

As obligate intracellular parasites, they must live and reproduce within an animal cell. Coccidian parasites infect the intestinal tracts of animals, and are the largest group of apicomplexan protozoa.


Infection with these parasites is known as coccidiosis. Coccidia can infect all mammals, some birds, some fish, some reptiles, and some amphibians. Most species of coccidia are species-specific in their choice of host.

An exception is Toxoplasma gondii , which can infect all mammals, although it can only undergo sexual reproduction in cats.


- Cryptosporidium / cryptosporidiosis
- Microsporidium / microosporidiosis
- Toxoplasma gondii / toxoplasmosis
- Isospora belli / isosporisosis
- Cyclospora cayetanensis / Cyclosporiasis (the resulting disease)