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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).
Free-living protozoa are common and often abundant in fresh, brackish and salt water, as well as other moist environments, such as soils and mosses. Some species thrive in extreme environments such as hot springs [ 54 ] and hypersaline lakes and lagoons. [ 55 ]
Amoebozoa includes many of the best-known amoeboid organisms, such as Chaos, Entamoeba, Pelomyxa and the genus Amoeba itself. Species of Amoebozoa may be either shelled (testate) or naked, and cells may possess flagella. Free-living species are common in both salt and freshwater as well as soil, moss and leaf litter.
Clockwise from top right: Amoeba proteus, Actinophrys sol, Acanthamoeba sp., Nuclearia thermophila., Euglypha acanthophora, neutrophil ingesting bacteria. An amoeba (/ ə ˈ m iː b ə /; less commonly spelled ameba or amœba; pl.: amoebas (less commonly, amebas) or amoebae (amebae) / ə ˈ m iː b i /), [1] often called an amoeboid, is a type of cell or unicellular organism with the ability ...
Naegleria lustrarea is a species of free-living amoeba belonging to the group Heterolobosea. It was described in 2024 from amoebae present in the gut of a salamander found in Arkansas. It is an amoeboflagellate, capable of transitioning from an amoeboid stage to a flagellate stage during its life cycle.
Euglenozoa is a rich (>2,000 species) [47] group of flagellates with very different lifestyles, including: the free-living heterotrophic (both osmo- and phagotrophic) [41] and photosynthetic euglenids (e.g., the euglenophytes, with chloroplasts originated from green algae); the free-living and parasitic kinetoplastids (such as Trypanosoma cruzi ...
Jul. 8—The Missouri Department of Health and Senior Services said this week it was notified of a Missouri resident with a laboratory-confirmed infection of Naegleria fowleri, a microscopic ...
Amoebic meningoencephalitis and keratitis is a brain-eating amoeba caused by free-living Naeglaria and Acanthomoeba. One way this pathogen can be acquired is by soaking contact lenses in water instead of contact solution. This will result in progressive ulceration of the cornea. [24]