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All protozoal species are assigned to the kingdom Protista in the Whittaker classification. The protozoa are then placed into various groups primarily on the basis of how they move. The groups are called phyla (singular, phylum) by some microbiologists, and classes by others.
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On the basis of light and electron microscopic morphology, the protozoa are currently classified into six phyla. Most species causing human disease are members of the phyla Sacromastigophora and Apicomplexa.
- Robert G. Yaeger
- 1996
- 1996
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.
Protozoa are single-celled eukaryotes that lack cell walls and have various shapes and modes of nutrition. They are classified into four types based on their locomotor organelles: amoeboids, flagellates, ciliates and sporozoans.
Protozoa are unicellular, eukaryotic, heterotrophic organisms. They are either free-living or parasites. There are around 65000 species of protozoans categorised in different groups. They lack a cell wall.
- Two diseases caused by Protozoans are – Malaria and Toxoplasmosis. The causative of Malaria is a spore-forming protozoan -Plasmodium spp. and is di...
- Ciliated protozoans are actively moving aquatic organisms. The coordinated movement of their cilia helps in locomotion and also to take food inside...
- A list of 5 protozoan diseases and their symptoms are as follows – Malaria : Fever, headache, vomiting, abdominal pain and it may lead to fatal con...
- Bacteria are known to cause several diseases in different species, some of the diseases caused by these bacteria are – Cholera, Tuberculosis, Syphi...
- Parasites are entities found on or in host entities. they derive their food from or as a result of their hosts. Although parasites are not diseases...
- The protozoa was first identified in moist and aquatic environments.
- Anton van Leeuwenhoek was the first person to demonstrate protozoan species.
Jul 15, 2024 · Protozoan, organism, usually single-celled and heterotrophic (using organic carbon as a source of energy), belonging to any of the major lineages of protists and, like most protists, typically microscopic. All protozoans are eukaryotes and therefore possess a “true,” or membrane-bound, nucleus.
Aug 3, 2023 · Protozoa are unicellular eukaryotic microorganisms that belong to the subkingdom Protozoa. They are classified into seven phyla based on their locomotion, structure, and lifestyle, with some causing human and animal diseases.
