Apicomplexans

Definition

Apicomplexans are a group of intracellular parasitic protozoans characterized by the presence of an apical complex, which aids in host cell invasion. They are known for causing significant diseases in humans and animals.

5 Must Know Facts For Your Next Test

1. Apicomplexans include notorious pathogens such as Plasmodium (malaria) and Toxoplasma gondii (toxoplasmosis).
2. The apical complex is a specialized structure that includes organelles such as micronemes, rhoptries, and dense granules.
3. These parasites have complex life cycles often involving multiple hosts and both sexual and asexual reproduction phases.
4. Apicomplexans possess a unique organelle called the apicoplast, which is involved in fatty acid synthesis and other essential metabolic pathways.
5. They are obligate intracellular parasites, meaning they must live within the cells of their host to survive and reproduce.

Related terms

Protozoa:

A diverse group of single-celled eukaryotic organisms that can be free-living or parasitic.

Plasmodium:

A genus of Apicomplexan parasites known for causing malaria in humans.

Toxoplasma gondii:

An Apicomplexan parasite that causes toxoplasmosis, often transmitted through undercooked meat or cat feces.