Granulomatous amebic encephalitis (GAE)
A rare, subacute-to-chronic, and nearly always fatal central nervous system infection.
Unlike acute amebic infections, GAE progresses slowly over weeks to months, making it exceptionally difficult to diagnose before it becomes terminal.
Causative Organisms...
The disease is primarily caused by two genera of ubiquitous, free-living environmental amebas found in soil, dust, and freshwater:
*Acanthamoeba species:
The most frequent cause, typically targeting individuals with compromised immune systems.
*Balamuthia mandrillaris:
A highly aggressive pathogen that can infect both immunocompromised individuals and completely healthy, immunocompetent hosts.
*Sappinia pedata:
An extremely rare cause, tied to only a single documented human case
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