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Naegleria gruberi
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Vahlkampfia (vall-camp-fee-a) (= Schizopyrenus - skitz-owe-pyre-een-us ?) a heterolobose amoeba, pseudopodia are produced in sudden bulges, and are lobose. Cyst with irregular outer wall. Differential interference contrast.
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Vahlkampfia (vall-camp-fee-a) (= Schizopyrenus - skitz-owe-pyre-een-us ?) a heterolobose amoeba, pseudopodia are produced in sudden bulges, and are lobose. Large hyaline region. Also with posterior contractile vacuole, nucleus with nucleolus and various food vacuoles and inclusions. Usually with a small uroid giving rise to filaments, but this is not evident here. Phase contrast.
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Vahlkampfia (vall-camp-fee-a) (= Schizopyrenus - skitz-owe-pyre-een-us ?) a heterolobose amoeba, pseudopodia are produced in sudden bulges, and are lobose. Large hyaline region. Also with posterior contractile vacuole, nucleus with nucleolus and various food vacuoles and inclusions. Also showing uroidal region (lower). Differential interference contrast.
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Vahlkampfia (vall-camp-fee-a) (= Schizopyrenus - skitz-owe-pyre-een-us ?) a heterolobose amoeba, pseudopodia are produced in sudden bulges, and are lobose. Large hyaline regions. Also with posterior contractile vacuole, nucleus with nucleolus and various food vacuoles and inclusions. Usually with small uroids giving rise to filaments. Several cells. Phase contrast.
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Some amoebae represent a threat to human health - they are the cause of an infection of the brain called amebic meningitis. Most of the forms which cause problems are known to favor warm waters - and the heated waters of Yellowstone present a heightened risk of infection - hence these informative signs to alert the public to the risks they take should they chose to swim in these waters.
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Willaertia (will-ert-ee-as), a heterolobose amoeba. The heterolobose amoebae usually move with the pseudopodia forming as sudden bulges. A large anterior hyaline zone and a posterior uroid evident. Differential interference contrast.
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Willaertia (will-ert-ee-as), a heterolobose amoeba. The heterolobose amoebae usually move with the pseudopodia forming as sudden bulges. This is the cyst with its exit pores. Differential interference contrast.
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Tetramitus (tet-rah-might-us) is one of the heterolobose amoebae, which can be found as amoebae, flagellates or cysts. The amoebae produce their pseudopodia suddenly, a pattern of behaviour referred to as eruptive as opposed to the more usual slow progressive formation of pseudopodia. With file filaments making up the posterior uroid. Contractile vacuole located at the posterior end of the cell. Phase contrast.
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Tetramitus rostratus.
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Description: English: (Naegleria fowleri lifecycle stages. A: Cyst of N. fowleri in culture. Naegleria fowleri does not form cysts in human tissue. Cysts in the environment and culture are spherical, 7-15 µm in diameter and have a smooth, single-layered wall. Cyst) Français : Étapes du cycle de vie de Naegleria fowleri. A = Kyste de N. fowleri en culture (Naegleria fowleri ne forme pas de kystes dans les tissus humains). Les kystes dans l'environnement et la culture sont sphériques, de 7 à 15 µm de diamètre et ont une paroi lisse à une seule couche). Source:
http://www.dpd.cdc.gov/dpdx/HTML/ImageLibrary/FreeLivingAmebic_il.htm. Author: CDC.
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Description: English: This 1973 photomicrograph depicted three Naegleria gruberi free-living amoebae. Free-living amoebae belonging to the genera Acanthamoeba, Balamuthia, and Naegleria, are important causes of disease in humans and animals. Date: 1973. Source: CDC
CDC ID# 9863. Author: CDC/ Dr. George Healy ID# 9863. Permission(
Reusing this file): This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.