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Clockwise from top right: Amoeba proteus, Actinophrys sol, Acanthamoeba sp., Nuclearia thermophila., Euglypha acanthophora, neutrophil ingesting bacteria. An amoeba (/ ə ˈ m iː b ə /; less commonly spelled ameba or amœba; pl.: amoebas (less commonly, amebas) or amoebae (amebae) / ə ˈ m iː b i /), [1] often called an amoeboid, is a type of cell or unicellular organism with the ability ...
Naegleria fowleri, also known as the brain-eating amoeba, is a species of the genus Naegleria. It belongs to the phylum Percolozoa and is classified as an amoeboflagellate excavate , [ 1 ] an organism capable of behaving as both an amoeba and a flagellate .
Amoeba, Entamoeba histolytica uses holozoic nutrition. Holozoic nutrition (Greek: holo -whole ; zoikos -of animals) is a type of heterotrophic nutrition that is characterized by the internalization ( ingestion ) and internal processing of liquids or solid food particles. [ 1 ]
Other examples are the dictyostelians, another group of slime molds, [11] and the closely related varioseans, such as Phalansterium. [7] Breviatea, a small class [a] related to animals, fungi and amoebozoans, is composed of anaerobic amoeboflagellates with two flagella. [13] [14]
Some examples of organisms that exhibit this type of locomotion are amoebae (such as Amoeba proteus and Naegleria gruberi, [2]) and slime molds, as well as some cells in humans such as leukocytes. Sarcomas , or cancers arising from connective tissue cells, are particularly adept at amoeboid movement, thus leading to their high rate of metastasis .
The genus Naegleria was established by Alexis Alexeieff in 1912, who grouped the flagellate amoeba. He coined the term Naegleria after Kurt Nägler, who researched amoebae. [40] It was not until 1965 that doctors Malcolm Fowler and Rodney F. Carter in Adelaide, Australia, reported the first four-human cases of amoebic meningoencephalitis. These ...
The brain-eating amoeba was blamed for the death in June of an 18-year-old Ohio woman, who became infected after rafting at the U.S. National Whitewater Center in Charlotte, North Carolina.
The surfaces of a variety of protozoa are covered with a layer of scales and or spicules. Examples include the amoeba Cochliopodium, many centrohelid heliozoa, synurophytes. The layer is often assumed to have a protective role. In some, such as the actinophryid heliozoa, the scales only form when the organism encysts.