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The Apicomplexa are a large phylum of parasitic alveolates. Most of them possess a unique form of organelle that comprises a type of plastid called an apicoplast, and an apical complex structure. The organelle is an adaptation that the apicomplexan applies in penetration of a host cell.
Plasmodium vivax is a protozoal parasite and a human pathogen. This parasite is the most frequent and widely distributed cause of recurring malaria. Although it is less virulent than Plasmodium falciparum, the deadliest of the five human malaria parasites, P. vivax malaria infections can lead to severe disease and death, often due to splenomegaly. P. vivax is carried by the female Anopheles mosquito; the males do not bite.
Leucocytozoon is a genus of parasitic alveolates belonging to the phylum Apicomplexa.
Cryptosporidium hominis, along with Cryptosporidium parvum, is among the medically important Cryptosporidium species. It is an obligate parasite of humans that can colonize the gastrointestinal tract resulting in the gastroenteritis and diarrhea characteristic of cryptosporidiosis. Unlike C. parvum, which has a rather broad host range, C. hominis is almost exclusively a parasite of humans. As a result, C. hominis has a low zoonotic potential compared to C. parvum. It is spread through the fecal-oral route usually by drinking water contaminated with oocyst laden feces. There are many exposure risks that people can encounter in affected areas of the world. Cryptosporidium infections are large contributors of child death and illness in heavily affected areas, yet low importance has been placed on both identifying the species and finding more treatment options outside of nitazoxanide for children and AIDS patients.
Adeleorina is a suborder of parasites in the phylum Apicomplexa.
Karyolysus is a genus of coccidia. With the exception of K. sonomae whose vertebrate host is the yellow-legged frog, species in this genus only infect lizards of the genus Lacerta.
Apicomplexans, a group of intracellular parasites, have life cycle stages evolved to allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a cellular variety with a distinct morphology and biochemistry.
The genus Polychromophilus consists of obligate intracellular eukaryotic parasites that infect bats from every continent except Antarctica. They are transmitted by bat flies, which act as an insect vector as well as the parasite’s site of sporogeny. Polychromophilus follows a fairly typical Haemospororidian lifecycle, with gametocytes and gametes restricted to the bloodstream of the host and meronts infecting organs – most notably the lungs and the liver. The type species is Polychromophilus melanipherus, and was described by Dionisi in 1898.
Dactylosoma is a genus of parasitic alveolates of the phylum Apicomplexia.
Hemolivia is a genus of the phylum Apicomplexia.
The genus Schellackia comprises obligate unicellular eukaryotic parasites within the phylum Apicomplexa, and infects numerous species of lizards and amphibians worldwide. Schellackia is transmitted via insect vectors, primarily mites and mosquitoes, which take up the parasite in blood meals. These vectors then subsequently infect reptilian and amphibian which consume the infected insects. The parasites deform erythrocytes of the host into crescents, and can be visualised using a blood smear.
The Archigregarinorida are an order of parasitic alveolates in the phylum Apicomplexa. Species in this order infect marine invertebrates — usually annelids, ascidians, hemichordates and sipunculids.
The Syncystidae are a family of parasitic alveolates in the phylum Apicomplexa. Species in this family infect insects (Aeshnidae).
The Schizocystidae are a family of parasitic alveolates in the phylum Apicomplexa. Species in this family infect insects.
Caulleryella is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects (Diptera).
Tipulocystis is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects (Diptera).
Farinocystis is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects (Coleoptera).
Mattesia is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects.
Syncystis is a genus of parasitic alveolates in the phylum Apicomplexa.
Schizocystidae is a genus of parasitic alveolates in the phylum Apicomplexa.
References
- ↑ Grell K G (1938) Untersuchungen an Schizogregarinen. I. Lipocystis polyspora n. g. m. sp., eine neue Schizogregarine aus dem Fettkörper von Panorpa communis L. Arch Protistenk 91:526-545
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