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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.
Free-living amoebae (or "FLA") [1] are a group of protozoa that are important causes of infectious disease in humans and animals. Naegleria fowleri is often included in the group "free-living amoebae", [ 2 ] [ 3 ] and this species causes a usually fatal condition traditionally called primary amoebic meningoencephalitis (PAM).
Bodo saltans (alternatively known as Pleuromonas jaculans) is a free-living nonparasitic species of kinetoplastid flagellated phagotrophic protozoa that feed on bacteria. [1] Bodo saltans cells have been reported in freshwater and marine environments. Bodo saltans is a single-celled bean-shaped organism 4 to 5 micrometers in length. It has two ...
Many microfauna, such as nematodes, inhabit soil habitats. Plant parasitic nematodes inhabit the roots of various plants, while free-living nematodes live in soil water films. [3] Microfauna also inhabit freshwater ecosystems. For example, freshwater microfauna in Australia include rotifers, ostracods, copepods, and cladocerans. [4]
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.
Main article: Human parasite Endoparasites Protozoan organisms Common name of organism or disease Latin name (sorted) Body parts affected Diagnostic specimen Prevalence Source/Transmission (Reservoir/Vector) Granulomatous amoebic encephalitis and Acanthamoeba keratitis (eye infection) Acanthamoeba spp. eye, brain, skin culture worldwide contact lenses cleaned with contaminated tap water ...
Micronuclearia is a genus of free-living protozoa containing the single species Micronuclearia podoventralis. While originally thought to be a nucleariid , as reflected in the name, [ 1 ] it is now inferred to be a member of the taxon Rigifilida , and to belong to the ' CRuMs ' assemblage (whereas nucleariids are opisthokonts ).
Bodo includes free-living, phagotrophic organisms that can be found in many marine and freshwater environments as well as some terrestrial environments. Being phagotrophic, Bodo feeds on bacteria and other microorganisms that it finds while swimming through its water-based habitats. [ 3 ]