Acanthamoeba

Magnified 500X, this 1973 photomicrograph depicted a mouse brain tissue specimen stained using the hematoxylin and eosin (H&E) staining technique, and revealing the presence of Acanthamoeba polyphaga protozoa.Acanthamoeba is a microscopic, free-living ameba commonly found in the environment that can cause rare but severe illness. Acanthamoeba causes three main types of illness involving the eye (keratitis), the brain and spinal cord (Granulomatous Amebic Encephalitis), and infections that can spread from an entry point to the entire body (disseminated disease).Created: 1973

Magnified 1200X, this 1973 photomicrograph depicted a mouse brain tissue specimen stained using the hematoxylin and eosin (H&E) staining technique, and revealing the presence of Acanthamoeba polyphaga protozoa.Acanthamoeba is a microscopic, free-living ameba commonly found in the environment that can cause rare but severe illness. Acanthamoeba causes three main types of illness involving the eye (keratitis), the brain and spinal cord (Granulomatous Amebic Encephalitis), and infections that can spread from an entry point to the entire body (disseminated disease).Created: 1973

Magnified 500X, this 1973 photomicrograph depicted a mouse brain tissue specimen stained using the hematoxylin and eosin (H&E) staining technique, revealing the presence of Acanthamoeba polyphaga protozoa.Acanthamoeba is a microscopic, free-living ameba commonly found in the environment that can cause rare but severe illness. Acanthamoeba causes three main types of illness involving the eye (keratitis), the brain and spinal cord (Granulomatous Amebic Encephalitis), and infections that can spread from an entry point to the entire body (disseminated disease).Created: 1973

Magnified 1000X, this photomicrograph revealed the presence of Acanthamoeba polyphaga parasitic microorganisms, which were found in a specimen of human trichrome-stained corneal tissue.Acanthamoeba is a microscopic, free-living ameba that is relatively common in the environment. This ameba has been isolated from water (including natural and treated water in pools or hot tubs), soil, air (in association with cooling towers, heating, ventilation and air conditioner [HVAC] systems), sewage systems, and drinking water systems (shower heads, taps). Most people will be exposed to Acanthamoeba during their lifetime and will not get sick. However, Acanthamoeba is capable of causing several infections in humans.Created: 1975

Magnified 1125X, this 1973 photomicrograph depicted an Acanthamoeba polyphaga protozoan cyst.Acanthamoeba is a microscopic, free-living ameba commonly found in the environment that can cause rare, but severe illness. Acanthamoeba causes three main types of illness involving the eye (keratitis), the brain and spinal cord (Granulomatous Amebic Encephalitis), and infections that can spread from an entry point to the entire body (disseminated disease).Created: 1973

Magnified 250X, this photomicrograph revealed the presence of Acanthamoeba sp. parasitic microorganisms, which were found in a specimen of human H&E-stained adrenal gland tissue.Acanthamoeba is a microscopic, free-living ameba that is relatively common in the environment. This ameba has been isolated from water (including natural and treated water in pools or hot tubs), soil, air (in association with cooling towers, heating, ventilation and air conditioner [HVAC] systems), sewage systems, and drinking water systems (shower heads, taps). Most people will be exposed to Acanthamoeba during their lifetime and will not get sick. However, Acanthamoeba is capable of causing several infections in humans.Created: 1975

Magnified 1000X, this photomicrograph revealed the presence of Acanthamoeba sp. parasitic microorganisms, which were found in a specimen of human H&E-stained adrenal gland tissue.Acanthamoeba is a microscopic, free-living ameba that is relatively common in the environment. This ameba has been isolated from water (including natural and treated water in pools or hot tubs), soil, air (in association with cooling towers, heating, ventilation and air conditioner [HVAC] systems), sewage systems, and drinking water systems (shower heads, taps). Most people will be exposed to Acanthamoeba during their lifetime and will not get sick. However, Acanthamoeba is capable of causing several infections in humans.Created: 1975

This photomicrograph depicted a magnified view of brain tissue within which was a centrally located Acanthamoeba sp. cyst. Acanthamoeba spp. are opportunistic free-living amebae, capable of causing granulomatous amebic encephalitis (GAE) in individuals with compromised immune systems.Created: 1977

Description: English: Acanthamoeba spp (Cyst). Date: 1 April 2005, 15:02:47. Source: Own work. Author: Punlop Anusonpornperm.

Description: A) Cysts in a vessel wall (arrows) of the patient (hematoxylin and eosin stain, magnification ×250). Inset shows a cyst at higher magnification (hematoxylin and eosin stain, magnification ×800). B) Immunohistochemical staining with antibody to en:Acanthamoeba cysts within vessel walls (magnification ×250). C) Polyacrylamide gel electrophoresis of PCR products for Acanthamoeba spp., en:Naegleria spp., and en:Balamuthia mandrillaris using JDP primers for a diagnostic small subunit rDNA fragment. M, molecular mass marker; Pat, patient; Neg, negative control; Pos, positive control. Source:Meersseman W, Lagrou K, Sciot R, de Jonckheere J, Haberler C, Walochnik J, Peetermans W, van Wijngaerden E. "Rapidly Fatal Acanthamoeba Encephalitis and Treatment of Cryoglobulinemia". Emerg Infect Dis [serial on the Internet]. 2007 March [cited 2007 Feb 23]. Available from https://www.cdc.gov/eid/content/13/3/469-G2.htm Public Domain rationale. Source: US gov. Author: US gov.

taxonomy:binomial="Acanthamoeba castellanii"

Acanthamoeba (a-can-tha-me-ba), collection of cysts. Irregular shape of cyst wall and with pores is characteristics of this and closely related genera. Differential interference contrast.

Acanthamoeba (a-can-tha-me-ba), fine extensions are referred to as subpseudopodia, because they emerge from the hyaline cap. Anterior is to north. Nucleus with dark nucleolus is in the centre of the cell. Large vacuole near base of cell is the contractile vacuole. Phase contrast.

Acanthamoeba (a-can-tha-me-ba), detail of hyaline cap with subpseudopodia. Nucleus also evident. Differential interference contrast.