Sappinia Pedata
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Sappinia Pedata
''Sappinia pedata'' is a species of Amoebozoa. ''Sappinia'' is a free-living amoeba (a single-celled organism), found in the environment. This organism can cause granulomatous amoebic encephalitis Granulomatous amoebic encephalitis (GAE) is a rare, usually fatal, subacute-to-chronic central nervous system disease caused by certain species of free-living amoebae of the genera ''Acanthamoeba'', ''Balamuthia'' and '' Sappinia''. The term is ... (GAE), however, only one case of GAE due to ''S. pedata'' infection has ever been reported, and the patient survived without any long-term consequences. References {{Taxonbar, from=Q7421083 Discosea ...
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Eukaryota
Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacteria and Archaea (both prokaryotes) make up the other two domains. The eukaryotes are usually now regarded as having emerged in the Archaea or as a sister of the Asgard archaea. This implies that there are only two domains of life, Bacteria and Archaea, with eukaryotes incorporated among archaea. Eukaryotes represent a small minority of the number of organisms, but, due to their generally much larger size, their collective global biomass is estimated to be about equal to that of prokaryotes. Eukaryotes emerged approximately 2.3–1.8 billion years ago, during the Proterozoic eon, likely as flagellated phagotrophs. Their name comes from the Greek εὖ (''eu'', "well" or "good") and κάρυον (''karyon'', "nut" or "kernel"). E ...
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Amoebozoa
Amoebozoa is a major taxonomic group containing about 2,400 described species of amoeboid protists, often possessing blunt, fingerlike, lobose pseudopods and tubular mitochondrial cristae. In traditional and currently no longer supported classification schemes, Amoebozoa is ranked as a phylum within either the kingdom Protista or the kingdom Protozoa. In the classification favored by the International Society of Protistologists, it is retained as an unranked " supergroup" within Eukaryota. Molecular genetic analysis supports Amoebozoa as a monophyletic clade. Modern studies of eukaryotic phylogenetic trees identify it as the sister group to Opisthokonta, another major clade which contains both fungi and animals as well as several other clades comprising some 300 species of unicellular eukaryotes. Amoebozoa and Opisthokonta are sometimes grouped together in a high-level taxon, variously named Unikonta, Amorphea or Opimoda. Amoebozoa includes many of the best-known ...
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Discosea
Discosea is a class of Amoebozoa, consisting of naked amoebae with a flattened, discoid body shape. Members of the group do not produce tubular or subcylindrical pseudopodia, like amoebae of the class Tubulinea. When a discosean is in motion, a transparent layer called ''hyaloplasm'' forms at the leading edge of the cell (see lamelliopodium). In some discoseans, short "subpseudopodia" may be extended from this hyaloplasm, but the granular contents of the cell do not flow into these, as in true pseudopodia. Discosean amoebae lack hard shells, but some, like '' Cochliopodium'' and '' Korotnevella'' secrete intricate organic scales which may cover the upper (dorsal) surface of the cell. No species have flagella or flagellated stages of life. The composition of Discosea is similar to that of the class Flabellinea, proposed by Alexey Smirnov and his collaborators in 2005. However, Discosea is a more comprehensive taxon, including several groups not included in Flabellinea. In 20 ...
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Flabellinia
The Flabellinia are a subclass of Amoebozoa. During locomotion the cells are flattened and have a clear layer called ''hyaloplasm'' along the front margin. Some form slender subpseudopodia projecting outward from the hyaloplasm, but the cell mass does not flow into these as in true pseudopodia, and advances without a definite central axis as in the Tubulinea. They also lack distinctive features like shells and flagella A flagellum (; ) is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates. A microorganism may have fro ..., and are united mainly by evidence from molecular trees. The group was originally created by Alexey Smirnov and his coauthors as the class Flabellinea, which was similar in composition to the group Discosea, proposed by Cavalier-Smith ''et al.'' (2004). In 2011, Smirnov accepted Discosea as a class and reduced Fl ...
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Thecamoebidae
Thecamoebidae is an Amoebozoa family. '' Dermamoeba'' has been classified in this group. However, there is recent evidence that it is not closely related to the other members of this group. See also * '' Sappinia diploidea'' References Amoebozoa families Discosea {{Amoebozoa-stub ...
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Sappinia
''Sappinia'' is a genus of heterotrophic, lobose amoebae within the family Thecamoebidae.Brown, M. W., Spiegel, F. W., & Silberman, J. D. 2007: Amoeba at Attention: Phylogenetic Affinity of ''Sappinia'' ''pedata.'' The Journal of Eukaryotic Microbiology, 0(0). doi:10.1111/j.1550-7408.2007.00292.x A defining feature of ''Sappinia'', which separates it from its sister genus ''Thecamoeba,'' is the presence of two closely apposed nuclei with a central, flattened connection.Walochnik, J., Wylezich, C., & Michel, R. 2010: The genus ''Sappinia'': History, phylogeny and medical relevance. Experimental Parasitology, 126(1), 4-13. doi:10.1016/j.exppara.2009.11.017Michel, R., Wylezich, C., Häuroder, B., & Smirnov, A. V. 2006: Phylogenetic position and notes on the ultrastructure of ''Sappinia diploidea'' (Thecamoebidae). Protistology 4(4), 319-325. ''Sappinia'' species have two life cycle stages: a trophozoite and a cyst. Up until 2015, only two species had been discovered, ''Sappinia ped ...
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Granulomatous Amoebic Encephalitis
Granulomatous amoebic encephalitis (GAE) is a rare, usually fatal, subacute-to-chronic central nervous system disease caused by certain species of free-living amoebae of the genera ''Acanthamoeba'', ''Balamuthia'' and '' Sappinia''. The term is most commonly used with ''Acanthamoeba''. In more modern references, the term "balamuthia amoebic encephalitis" (BAE) is commonly used when ''Balamuthia mandrillaris'' is the cause. Symptoms and signs GAE starts slowly, with symptoms like headache, nausea, dizziness, irritability and a low-grade fever. The CNS symptoms depend on the part of the brain that is infected. Changes in behavior are an important sign. Other CNS signs may include seizures, focal neurologic signs, diplopia (double vision), cranial nerve palsies, ataxia, confusion, and personality changes. Some of the symptoms may mimic glioma (especially brainstem glioma), or other brain diseases, which may hamper timely diagnosis. The symptoms are caused by inflammatory necrosis o ...
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