The apical complex is a specialized concentration of organelles, vacuoles, and microtubules located at one end of an apicomplexan cell. This structure enables the parasite to penetrate and enter host cells.

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Apicomplexans are a subgroup of the Chromalveolata supergroup that function as intra- or extracellular parasites. They are characterized by having an apical complex at one end of the cell that allows them to enter host cells, and they exhibit complex life cycles that often require transmission between multiple hosts.

Apicomplexans

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Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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Cryptosporidium is a genus of apicomplexans that causes cryptosporidiosis.

Cryptosporidium

Theileria is a genus of apicomplexans, sometimes associated with Babesia, that causes babeiosis.

Theileria

Toxoplasma is a genus of apicomplexans that causes toxoplasmosis.

Toxoplasma

Apical Complex

A sporozoite is an infective cell stage in the life cycle of apicomplexan parasites that undergoes schizogony to produce numerous merozoites.

Sporozoite

Plasmodium is a genus of apicomplexan parasites that are transmitted through mosquito bites and cause malaria. In host blood cells, Plasmodium can be observed in different developmental stages, including the ring form, the young trophozoite, and the multinucleate schizont.

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