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Protozoa (sg.: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris.
Naegleria / n ɛ ˈ ɡ l ɪər i ə / is a genus consisting of 47 described species of protozoa often found in warm aquatic environments as well as soil habitats worldwide. [1] It has three life cycle forms: the amoeboid stage, the cyst stage, and the flagellated stage, and has been routinely studied for its ease in change from amoeboid to flagellated stages. [1]
In 1958, Gauthier-Lièvre and Thomas divided the genus into 10 groups depending on difference in shell morphology. These 10 groups are based on a survey conducted of the African species of Difflugia [ 3 ] The 10 shell shape classifications are lobed, collared, compressed, urceolate, globose, ovoid-globose, elongate, acute angled, horned and ...
This was the first protozoan parasite of humans that he recorded, and the first to be seen under a microscope. [ 6 ] A few years later, in 1687, the Italian biologists Giovanni Cosimo Bonomo and Diacinto Cestoni published that scabies is caused by the parasitic mite Sarcoptes scabiei , marking scabies as the first disease of humans with a known ...
Acanthamoeba spp. are among the most prevalent protozoa found in the environment. [1] They are distributed worldwide, and have been isolated from soil, air, sewage, seawater, chlorinated swimming pools, domestic tap water, bottled water, dental treatment units, hospitals, air-conditioning units, and contact lens cases.
It has a polymorphic life cycle, ranging from free-living cells to large colonies. [33] It has the ability to form floating colonies, where hundreds of cells are embedded in a gel matrix, which can increase massively in size during blooms. [34] As a result, Phaeocystis is an important contributor to the marine carbon [35] and sulfur cycles. [36]
Zoothamnium is a sessile peritrich, meaning it is a ciliated vase shaped protozoan that is nonmotile in nature. The genus comprises more than seventy species. Differentiation between species can often be difficult due to the strong similarities in form and function. [2]
Tetrahymena thermophila is a species of Ciliophora in the family Tetrahymenidae. [1] It is a free living protozoon and occurs in fresh water. [2]There is little information on the ecology and natural history of this species, [3] but it is the most widely known and widely studied species in the genus Tetrahymena.
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