Apicomplexa
noun pluralMedical Definition of Apicomplexa
Note: The group Apicomplexa was proposed for use in place of Sporozoa because the infective stage (sporozoite) is not always contained within a spore. While Apicomplexa and Sporozoa are often considered synonymous, not every species in the group Sporozoa is included in Apicomplexa. One uniting feature of members of Apicomplexa is a specialized complex of organelles at the apex of the cell which facilitates penetration of a host cell during its infective stage.
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