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Goldfuss created Protozoa as a class containing what he believed to be the simplest animals. [3] Originally, the group included not only single-celled microorganisms but also some "lower" multicellular animals, such as rotifers , corals , sponges , jellyfish , bryozoans and polychaete worms . [ 12 ]
Protozoan infections are parasitic diseases caused by organisms formerly classified in the kingdom Protozoa. These organisms are now classified in the supergroups Excavata, Amoebozoa, Harosa (SAR supergroup), and Archaeplastida. They are usually contracted by either an insect vector or by contact with an infected substance or surface. [1]
A protist (/ ˈ p r oʊ t ɪ s t /) is any eukaryotic organism (one with cells containing a nucleus) that is not an animal, plant, or fungus.The protists do not form a natural group, or clade, since they exclude certain eukaryotes with whom they share a common ancestor; [a] but, like algae or invertebrates, the grouping is used for convenience.
In most systems of taxonomy, "Ciliophora" is ranked as a phylum [6] under any of several kingdoms, including Chromista, [7] Protista [8] or Protozoa. [9] In some older systems of classification, such as the influential taxonomic works of Alfred Kahl , ciliated protozoa are placed within the class " Ciliata " [ 10 ] [ 11 ] (a term which can also ...
Life-cycle of Entamoeba histolytica. Entamoeba histolytica is an anaerobic parasitic amoebozoan, part of the genus Entamoeba. [1] Predominantly infecting humans and other primates causing amoebiasis, E. histolytica is estimated to infect about 35-50 million people worldwide. [1]
Kinetoplastida (or Kinetoplastea, as a class) is a group of flagellated protists belonging to the phylum Euglenozoa, [3] [4] and characterised by the presence of a distinctive organelle called the kinetoplast (hence the name), a granule containing a large mass of DNA.
Trypanosoma is a genus of kinetoplastids (class Trypanosomatidae [1]), a monophyletic [2] group of unicellular parasitic flagellate protozoa. Trypanosoma is part of the phylum Euglenozoa. [3] The name is derived from the Ancient Greek trypano-(borer) and soma (body) because of their corkscrew-like motion.
"Marine protists are a polyphyletic group of organisms playing major roles in the ecology and biogeochemistry of the oceans, including performing much of Earth's photosynthesis and driving the carbon, nitrogen, and silicon cycles.