A fatal case of meningoencephalitis due to a free-living amoeba of uncertain identity—probably acanthamoeba SP

There are 2 main types of meningoencephalitis caused by free-living amoebae. The first is a well-defined acutely fatal disease resembling fulminating bacterial meningitis. It is caused by the single species Naegleria fowleri. The second is a more poorly defined disease that runs a subacute or chronic course and is characterized by focal granulomatous lesions in the brain. The causative organisms are probably Acanthamoeba sp. in most cases, but …