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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. [1] [2] Historically, protozoans were regarded as "one-celled animals".
Protozoan infection. Giardia lamblia, an infectious protozoan. 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 ...
Didinium. Stein, 1859. Didinium is a genus of unicellular ciliates with at least ten accepted species. All are free-living carnivores. Most are found in fresh and brackish water, but three marine species are known. Their diet consists largely of Paramecium, although they will also attack and consume other ciliates. [1]
Ciliates are an important group of protists, common almost anywhere there is water—in lakes, ponds, oceans, rivers, and soils, including anoxic and oxygen-depleted habitats. [2] About 4,500 unique free-living species have been described, and the potential number of extant species is estimated at 27,000–40,000. [3]
phylum Protozoa → subphylum Sarcomastigophora. Characteristics. It gets its name from the combination of "Sarcodina" (which is an older term used for amoeboids) and "Mastigophora" (which is an older term for flagellates). The characteristics of phylum sarcomastigophora are :
Protozoal diseases. This category reflects the organization of International Statistical Classification of Diseases and Related Health Problems, 10th Revision. Generally, diseases outlined within the ICD-10 codes B50-B64 within Chapter I: Certain infectious and parasitic diseases should be included in this category.
Antiprotozoal. Antiprotozoal agents ( ATC code: ATC P01) is a class of pharmaceuticals used in treatment of protozoan infection . A paraphyletic group, protozoans have little in common with each other. For example, Entamoeba histolytica, a unikont eukaryotic organism, is more closely related to Homo sapiens (humans), which also belongs to the ...
Euglena viridis. (O.F.Müller) Ehrenberg. Euglena viridis is a freshwater, single cell, mixotroph microalgae bearing a secondary chloroplast. [1] Their chloroplast is bounded by three layers of membrane without a nucleomorph. [2] Normally, it is 40–65 μm long, slightly bigger than other well-known Euglena species: Euglena gracilis.