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Sporozoa
(redirected from class Sporozoa)

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Sporozoa (spôr'əzō`ə), phylum of unicellular heterotrophic organisms of the kingdom Protista Protista (prōtĭs`tə) or Protoctista
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. Unlike most other protozoans protozoan (prō'təzō`ən), informal term for the unicellular heterotrophs of the kingdom Protista .
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, sporozoans have no cilia or flagella. All species are parasitic and have elaborate life cycles, often requiring more than one host. The best-known sporozoan is Plasmodium falciparum, the causative organism of malaria malaria, infectious parasitic disease that can be either acute or chronic and is frequently recurrent. Malaria is common in Africa, Central and South America, the Mediterranean countries, Asia, and many of the Pacific islands.
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Sporozoa [‚spȯr·ə′zō·ə]
(invertebrate zoology)
A subphylum of parasitic Protozoa, typically producing spores during the asexual stages of the life cycle.

Sporozoa

A subphylum of Protozoa, typically with spores. The spores are simple and have no polar filaments. There is a single type of nucleus. There are no cilia or flagella except for flagellated microgametes in some groups. In most Sporozoa there is an alternation of sexual and asexual stages in the life cycle. In the sexual stage, fertilization is by syngamy, that is, the union of male and female gametes. All Sporozoa are parasitic. The subphylum is divided into three classes—Telosporea, Toxoplasmea, and Haplosporea. See Haplosporea, Protozoa



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