viernes, 24 de julio de 2015

Hoja informativa | Naegleria fowleri | CDC

Hoja informativa | Naegleria fowleri | CDC

Naegleria Hoja informativa



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Información general

La Naegleria es una ameba (un microbio vivo unicelular) que con frecuencia se encuentra en agua dulce templada (por ejemplo, en lagos, ríos y aguas termales), así como en la tierra. Solo una especie (tipo) de Naegleria infecta a las personas: laNaegleria fowleri.
Esta información no debe ser utilizada para el autodiagnóstico ni en lugar de la consulta médica. Si tiene alguna pregunta acerca de los parásitos que se describen arriba o cree que puede tener una infección parasitaria, consulte a un proveedor de atención médica.


*Enfermedad poco frecuente
No hay una definición universal de “enfermedad poco frecuente”, pero la Ley de Enfermedades Poco Frecuentes en los EE. UU. del 2002 (U.S. Rare Disease Act of 2002)Aclaraci?n sobre los enlaces a sitios web externos define una "enfermedad poco frecuente" como aquella que afecta a menos de 200 000 personas en el país y esta definición ha sido adoptada por los Institutos Nacionales de la Salud, Oficina de Enfermedades Poco Frecuentes.Aclaraci?n sobre los enlaces a sitios web externos
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Did You Know?

Boy jumps into water holding his nose





Primary Amebic Meningoencephalitis (PAM) | Naegleria fowleri | CDC



Naegleria fowleri — Primary Amebic Meningoencephalitis (PAM) — Amebic Encephalitis



Left: EM image of Naegleria fowleri in its cyst stage. Center: EM image of Naegleria fowleri in its ameboid trophozoite stage. Right: EM image of Naegleria fowleri in its flagellated stage.
View Fact Sheets About Naegleria fowleri and Primary Amebic Meningoencephalitis
Naegleria fowleri (commonly referred to as the "brain-eating amoeba" or "brain-eating ameba"), is a free-living microscopic ameba*, (single-celled living organism). It can cause a rare** and devastating infection of the brain called primary amebic meningoencephalitis (PAM). The ameba is commonly found in warm freshwater (e.g. lakes, rivers, and hot springs) and soil. Naegleria fowleri usually infects people when contaminated water enters the body through the nose. Once the ameba enters the nose, it travels to the brain where it causes PAM, which is usually fatal. Infection typically occurs when people go swimming or diving in warm freshwater places, like lakes and rivers. In very rare instances, Naegleria infections may also occur when contaminated water from other sources (such as inadequately chlorinated swimming pool water or heated and contaminated tap water) enters the nose 1-4. You cannot get infected from drinking water contaminated with Naegleria.
Left: EM image of Naegleria fowleri in its cyst stage. Center: EM image of Naegleria fowleri in its ameboid trophozoite stage. Right: EM image of Naegleria fowleri in its flagellated stage. Credit: DPDxand GS Visvesvara. See Videos and Photos of Naegleria fowleri  for further images.


Explore Naegleria fowleri

References
  1. Yoder JS, Eddy BA, Visvesvara GS, Capewell L, Beach MJ. The epidemiology of primary amoebic meningoencephalitis in the USA, 1962-2008.External Web Site Icon Epidemiol Infect. 2010;138(7):968-75.
  2. Visvesvara GS. Free-living amebae as opportunistic agents of human disease. Adobe PDF file [PDF - 13 pages]External Web Site Icon J Neuroparasitol. 2010;1.
  3. Marciano-Cabral F, Cabral G. The immune response to Naegleria fowleri amebae and pathogenesis of infection.External Web Site Icon FEMS Immunol Med Microbiol. 2007;51:243-59.
  4. CDC. Primary amebic meningoencephalitis associated with ritual nasal rinsing — St. Thomas, U.S. Virgin Islands, 2012.MMWR Morb Mortal Wkly Rep. 2013;62(45):903.


*About the Term "Ameba"
In U.S. English, the single-celled living organism described here is an ameba. The word amoeba, with an "o", is used as part of a scientific genus name (such as Amoeba or Acanthamoeba). In British English, both the generic organism term and genera names are spelled amoeba with an "o".
**Rare Disease
There is no universal definition of a "rare disease" but the U.S. Rare Disease Act of 2002External Web Site Icon defined a rare disease as affecting less than 200,000 people in the U.S. and this definition has been adopted by the National Institutes of Health, Office of Rare Diseases.External Web Site Icon
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