A phylum of the kingdom Protista (formerly a division of protozoa called Sporozoa); named for a complex of cell organelles (apical microtubule complex) at the apex of the sporozoite form that can penetrate host cells. It includes the medically important genera Plasmodium, Toxoplasma, Cryptosporidium, and Isospora.

Apicomplexa is a sample topic from the Taber's Medical Dictionary.

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