Naegleria

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.

Description: Naegleria. Date:. Source: Own work. Author: Dennis Myts. Other versions: Image:Naegleria (formes).png.

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.

Naegleria gruberi

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.