Canadian Medical Guide > Organisms > Animals > Invertebrates > Protozoa > Apicomplexa Terms and Definitions

Apicomplexa

Medical Definition:	A phylum of protozoa characterized by the presence of complex apical organelles generally consisting of a conoid that aids in penetrating host cells, rhoptries that possibly secrete a proteolytic enzyme, and subpellicular microtubules that may be related to motility.
Guide Notes:	GEN: prefer specifics; infection: coord IM with PROTOZOAN INFECTIONS (IM); coord with specific protozoan terms (ANTIGENS, PROTOZOAN, etc) if pertinent
Also Called:	Sporozoea

Apicomplexa Categories.

	Coccidia - A subclass of protozoans commonly parasitic in the epithelial cells of the intestinal tract but also found in the liver and other organs. Its organisms are found in both vertebrates and higher invertebrates and comprise two orders: EIMERIIDA and EUCOCCIDIIDA.
	Haemosporida - An order of heteroxenous protozoa in which the macrogamete and microgamont develop independently. A conoid is usually absent.
	Piroplasmia - A subclass of heteroxenous parasitic protozoa usually transmitted by ticks. Its organisms are rod-shaped or amoeboid with conoid, oocysts, spores, and pseudocysts absent. Locomotion is by body flexion, gliding, or, in sexual stages, by large axopodium-like organelles.

Apicomplexa Medical Definitions and Terms

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