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Topic: Amoeba (genus)

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	Amoeba - Wikipedia, the free encyclopedia
		Amoeba is a genus of protozoa that moves by means of temporary projections called pseudopods, and is well-known as a representative unicellular organism.
		The word amoeba or ameba is variously used to refer to it and its close relatives, now grouped as the Amoebozoa, or to all protozoa that move using pseudopods, otherwise termed amoeboids.
		Amoeba itself is found in freshwater, typically on decaying vegetation from streams, but is not especially common in nature.
	en.wikipedia.org /wiki/Amoeba (433 words)

	Amoeba
		The word amoeba is a descriptive term for various single-celled organisms which move about by means of temporary projections, called pseudopods.
		Amoeba may be as large as 700-800 μm in size, though some are much smaller.
		Jennings made a full study of the movements of Amoeba, and of its general behaviour, and found therein many indications that these are on the whole such as we should expect of an organism working by "trial and error" rather than the uniform modes of non-living beings.
	www.ebroadcast.com.au /lookup/encyclopedia/am/Ameba.html (431 words)

	Brain Eating Amoebas by Viera Scheibner Ph.D.
		Amoebas were isolated from the air (Kingston and Warhurst, 1969) in the UK during an investigation into the possibility of isolating respiratory syncytial virus, and from the surfaces in cubicles in which infants with acute bronchiolitis were being nursed.
		Amoebas, including those pathogenic to animals and humans, were found in swimming pools (Cerva et al., 1969) in Czechoslovakia where 16 young victims died of acute purulent meningoencephalitis, and thermal pools in northern New Zealand (Mandal et al., 1970: Cursons and Brown, 1972; and others).
		It was concluded that the soil amoebas are stimulated to excyst to the infectious or trophozoite form by gram-negative bacilli which are present in the faecal stream, in decaying vegetation and in some small lakes during summer, as well as in drainage ditches, swamps and sewage outfalls.
	www.whale.to /vaccines/amoebas.html (3732 words)

	amoeba blog
		contractile vacuole - a cavity within the amoeba that excretes excess water and waste; the waste is brought to the cell membrane and is then eliminated from the amoeba.
		A protozoan of the genus Amoeba or related genera, occurring in water and soil and as a parasite in other animals.
		When starved, individual amoebae aggregate to form a multicellular fruiting body in which some cells give up reproduction and become sterile stalk cells that aid in the dispersal of the fertile spore cells.
	amoebablog.blogspot.com (1590 words)

	Amoeba. Amoeboae form a group of the single-celled organisms called Protozoa.
		In the middle of the cell, surrounded by the protoplasm, is the nucleus, a body which can be thought of as the blueprint for the organization of the cell's activity.
		If an amoeba is cut in two the half with the nucleus may survive and reproduce; the other moves around for a while but cannot digest its food, and when its reserves are gone it dies.
		The name amoeba is applied not only to members of the genus Amoeba but to a range of different types of Protozoa with pseudopodia living in the sea, in fresh water, in damp soil and in the bodies of larger animals.
	www.planet-pets.com /plntamba.htm (187 words)

	amoeba
		Amoebas are so tiny that you need a microscope to see them.
		Or, to eat, the amoeba stretches out the pseudopod, surrounds a piece of food, and pulls it into the rest of the amoeba's body.
		Amoebas are a problem when they live in unhealthy areas, such as places with raw sewage.
	www.fcps.k12.va.us /StratfordLandingES/Ecology/mpages/amoeba.htm (284 words)

	Amoebae
		Traditionally, the amoebae have been classified as the protozoan taxon Sarcodina, with a taxonomic structure that separated species with supported pseudodpodia from those with unsupported pseudopodia, and those with skeletal elements, from those without.
		The amoebae are probably the last large area of protists which have to be fully documented and explored, although progress in that area is now taking place (Amaral, Silberman).
		Naked amoebae are major consumers of bacteria in soil ecosystems and are believed to occupy the same key role there as flagellates do in aquatic ecosystems (that of recycling bacterial productivity and ensuring nutrient regeneration and continued functioning of the ecosystem).
	tolweb.org /accessory/Amoebae?acc_id=51 (751 words)

	How to identify an amoeba: brief introduction
		All amoebae are capable to float, and due to the existing of floating forms it is impossible to subdivide amoebae into “benthic” and “planctonic” species in water habitats.
		For smaller amoebae and amoebae which are maintained on the agar without overlay, wash of cells from the dish with the drop of respective media, place the drop on the object slide, close with coverslip and observe immediately.
		This is characteristic for amoebae of fan-shaped, dactylopodial and paramoebian morphotypes.
	amoeba.ifmo.ru /guide.htm (5821 words)

	Amoeba
		Amoeba proteus is a so called "giant amoeba", being large compared to the huge number of other genera generally considered to belonging to the amoeba.
		Amaral Zettler, L.A., Nerad, T.A., O'Kelly, C.J., Peglar, M.T., Gillevet, P.M., Silberman, J.D. and Sogin, M.L. "A molecular reassessment of the Leptomyxid amoebae." Protist 151, 275-282.
		Prusch, R.D. and Thompson, V.L. "Diacyglycerol as a component of the signal-coupling pathways during the initiation of endocytosis in Amoeba proteus.
	www.bms.ed.ac.uk /research/others/smaciver/amoeba.htm (409 words)

	[No title] (Site not responding. Last check: 2007-10-03)
		This class contains the amoebae (genus Amoeba), which move by sending out fingerlike projections called pseudopodia (meaning false feet) from the cell...
		Because of this characteristic, amoebae lack a definate shape as this changes with the motion of the cellular contents.
		When an amoeba moves, it extends a pseudopodium and anchors its tip, and then more cytoplasm streams into the pseudopodium.
	www.angelfire.com /vt/thelittleamoeba/amoeba.html (283 words)

	Euglena - Wikipedia, the free encyclopedia
		Euglena is a common genus of flagellate protozoa, typical of the euglenids, and commonly found in nutrient-rich freshwater, with a few marine species.
		The cells vary in length from around 20 to 300 μm, and are typically cylindrical, oval, or spindle-shaped with a single emergent flagellum.
		(2003) revised the genus so that it forms a monophyletic group, moving several species with rigid pellicles to the genus Lepocinclis and including several species without chloroplasts, formerly classified as Astasia and Khawkinea.
	en.wikipedia.org /wiki/Euglena (582 words)

	[No title]
		Genus Amoeba- This is an excellent specimen to examine for general Sarcodine anatomy.
		Genus Difflugia- Members of this genus are structurally similar to Amoeba except that they possess a one-chambered shell or test into which the entire cell may be withdrawn (Fig.
		Genus Didinium A Didinium is a barrel- shaped freshwater ciliate having a rounded posterior end and a tube-shaped proboscis at the anterior end.
	www.brown.edu /Courses/Bio_41/labprotista.doc (4136 words)

	HighBeam Encyclopedia - ameba (Site not responding. Last check: 2007-10-03)
		AMEBA [ameba] or amoeba, common name for certain one-celled organisms belonging to the phylum Sarcodina of the kingdom Protista.
		Members of the genus Pelomyxa, however, may be well over a millimeter (up to 8 mm) in diameter and may contain hundreds of nuclei.
		The many genera of amebas were given their common name because of their resemblance to the genus Amoeba (order Amoebida), which includes several large, common species of which the freshwater Amoeba proteus is the most familiar.
	www.encyclopedia.com /html/a1/ameba.asp (596 words)

	-see me not so-
		Amoeba: [New Latin, genus name, from Greek amoibE change, from ameibein to change] any of a large genus (Amoeba) of naked rhizopod protozoans with lobed and never anastomosing pseudopodia, without permanent organelles or supporting structures, and of wide distribution in fresh and salt water and moist terrestrial environments, reproduction is through Binary Fission.
		Amoebas have it easy, they just float about like a little lump, when they’re hungry they just absorb something and when they’re lonely they just split in two.
		But back to my amoeba, if I were an amoeba then the mud would be my home, and I’m sure I’d like it, because in the mud no amoeba would come along and say to me. “I camped out in the cold dark mud and now I’m a better amoeba then you.
	www.angelfire.com /droid/monkshoodtea/goofy.htm (532 words)

	'How fast does an amoeba travel
		It would be an interesting experiment to measure their velocity if you have access to a microscope, an amoeba culture, stop watch and calibrated eyepiece (or put 1mm square graph paper under the slide).
		Second, there are several major basic morphological kinds of unarmored amoeba, i.e., (a) those with many pseudopods, into any one of which the animal may flow, and (b) those with essentially only one pseudopod (the limax, or slug type).
		Fifth, an amoeba enters "resting" stages (I'm not referring to cysts) under certain conditions, and at other times hurries along in pursuit of food it may detect by sensory chemical means.
	www.microscopy-uk.org.uk /mag/art98/forum1.html (1101 words)

	Protozoa: Testate Amoebae. An introduction with photomicrographs. (Site not responding. Last check: 2007-10-03)
		The testate amoebae produce shells, or tests, either by secreting them, as in the case of Euglypha, or by accreting them from appropriately sized particles encountered on their travels.
		Arcella is one of the most frequently encountered of the testate amoebae, especially in highly organically polluted waters, and in the sediments on the pond's bottom, where plant materials rot under conditions of low oxygen concentration.
		When feeding, the amoeba extends a few lobopodia from the aperture in the test, but these are so difficult to see that close observation is needed to establish whether or not any given individual is alive.
	www.micrographia.com /specbiol/protis/homamoeb/amts0100.htm (499 words)

	[No title]
		is a common freshwater fungus and the main genus of water molds responsible for fungal infection of fish and their eggs.
		The asexual sporangia of this genus are elongate and look a lot like hyphae so they are difficult to see on a culture plate.
		Members of this genus are commonly found in soil.
	www.uvm.edu /~shalik/for234/handoutlab2.html (1474 words)

	BSC2011 Lab
		Difflugia is a freshwater amoeba with an external, egg-shaped shell that is composed of sand and other organic particles.
		The shelled amoeba are among the most beautiful animals on earth.
		This slide shows a variety of shelled amoeba called foraminiferans; only the shells (or tests) are present here.
	ucf.tekkom.net /bsc2011/?sort=class&lab_number=1 (982 words)

	Microorganisms Resistant to Free-Living Amoebae -- Greub and Raoult 17 (2): 413 -- Clinical Microbiology Reviews
		The role of free-living amoebae as a reservoir of intracellular bacteria, as a Trojan horse, in the transmission of its bacterial host, in the selection of virulence traits, and in the adaptation of the bacteria to macrophages.
		The bacteria are shown in red, the amoebae are shown in grey, and their mitochondria are shown in green.
		from an amoeba isolated from nasal mucosa (7, 179).
	cmr.asm.org /cgi/content/full/17/2/413 (7197 words)

	Protista
		Depending on the genus, the test of an individual foram may be a single chamber or an intricately coiled series of chambers.
		Organisms of different species of this genus are responsible for the African sleeping sickness and Chagas’ disease.
		These parasites are transmitted to humans through the bites of mosquitoes of the genus Anopheles, and they infect and rupture red blood-cells, which causes cycles of fever and chills.
	inside.msj.edu /academics/faculty/davisr/potpouri/protista.htm (2172 words)

	CDC - Amoeba-Resisting Bacteria and Ventilator-Associated Pneumonia
		Free-living amoebae have been shown to be a reservoir of pathogens such as Legionella sp., Burkholderia picketti, and Cryptococcus neoformans (4–7).
		Detection of antibodies reacting to amoeba antigens would also be important because infections could occur through inhalation (perhaps after colonization) of infected amoebae acting as a “Trojan horse” (6).
		In future studies, isolation of amoebae in the aquatic environment as in the BAL samples of patients will be performed for further use as antigens.
	www.cdc.gov /ncidod/eid/vol9no7/03-0065.htm (4052 words)

	PID - Amoebidium Introduction (Site not responding. Last check: 2007-10-03)
		Amoebidium is a genus of small protists that form walled, hairlike microthalli on the external surface of freshwater crustacea and insect larvae, including mosquitos.
		The genus name, which means "little amoeba", refers to the amoeboid cells that the thalli may produce during asexual reproduction.
		The related genus Paramoebidium, with seven described species, differs from Amoebidium primarily in habitat, which is in the hindgut of aquatic insect larvae and crustaceans.
	megasun.bch.umontreal.ca /protists/apar/introduction.html (186 words)

	naglieri
		Much is known about this genus (Marciano-Cabral, 1988) because of its abundance, the problems it can cause in human health, and because it has been used as a model for eukaryotic differentiation.
		This amoeba is a facultative pathogen capable of living many generations without infecting a host.
		Trophozoites are thought to enter the nose during swimming in warm water and thereafter the brain by locomotion and destruction of neurons.
	www.munshi.4t.com /wbt/Naegleria.html (879 words)

	Online Introduction to Biology - History - Classification / Taxonomy
		Closely-related species could be collected within a larger grouping, a genus; related genera are grouped into a family, families into an order, orders into a class, classes into a phylum, and phyla into a Kingdom, the biggest and most general group.
		In Linnaeus' time, there were just the Animal Kingdom and the Plant Kingdom, but later discoveries have convinced some biologists that some distinct types of organisms, such as Fungi and some tiny single-celled organisms, should be given their own separate Kingdoms.
		Species names (and Genus names) are also treated as foreign words in English, meaning that they are italicized or underlined when printed or written.
	faculty.fmcc.suny.edu /mcdarby/Majors101Book/Chapter_02-A_Bit_of_History/02-Explaining-Life-Classification.htm (1246 words)

	Protist Gallery
		This is a ciliate protist in the genus Euplotes (20-30 micrometers).
		This is a small amoeba in the genus Vanella (10-15 micrometers).
		This is an unidentified ciliate (at least a new species) recovered from the surface of massive corals at a depth of 80 feet in the outer Bahaman Islands.
	www.uwf.edu /rsnyder/protists/protist.html (534 words)

	ameoba damage brain caused by vaccination. Ughh! (Site not responding. Last check: 2007-10-03)
		The first mention of "Free-living amoebae as contaminants in monkey-kidney tissue cultures" is that by Jahnes, Fullmer and Li Jahnes et al.
		ISOLATION OF AMOEBAS IN SOIL and AIR, AND THROATS and NOSES OF Further research concentrated on isolation of amoebas from water and soil, and throats and noses of healthy people.
		Armstrong,J. and Pereira, Marguerite D. "Identification of 'Ryan virus' as an amoeba of the genus Hartmanella", Brit.
	www.alternative-doctor.com /vaccination/amoebas.html (3870 words)

	This Week (Site not responding. Last check: 2007-10-03)
		A new genus has been proposed to host a 3.2 to 3.5-million-year-old hominid skull found by anthropologist Meave Leakey and her team in Kenya.
		An amoeba having trouble reproducing--or separating into two single-celled amoebae--calls for help, and often gets it, possibly bribing others with food, a new study shows.
		Other amoebae push their way to and through the site and break the connection.
	www.calacademy.org /thisweek/Archive/2001/20010328.html (1042 words)

	Parasitic Diseases Acquired Through Ingestion (Site not responding. Last check: 2007-10-03)
		Although these protozoans parasitize a wide range of animals, including amphibians, reptiles, birds and mammals, only two species are known to be pathogenic to their hosts.
		Adherence of amoeba to the intestinal mucus barrier.
		Depletion of the mucus layer and disruption of the intestinal mucosa.
	nsm1.utdallas.edu /bio/gonzalez/lecture/micro/pdact.htm (584 words)

	Sample test questions (Site not responding. Last check: 2007-10-03)
		The genus Dictyostelium is used commercially for : _________________ ____________________________________________________________________ 3).
		The genus Ulva (sea lettuce) is in the phylum: a) Bacillariophyta b) Chlorophyta c) Dinofalgellate d) Rhodophyta 21).
		Blue cheese is made using the genus: _____________________ 23).
	web.fccj.org /~dbyres/2011sampletest2.htm (365 words)

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