<prompt> Primary amoebic encephalitis is caused by:Nageleria fowleriAcanthameba spp.Entamoeba hartmanniBalmuthia mandrillaris  <response>: Ref: Parija SC. Textbook of Medical Parasitology. 2nd Ed. London: John Wiley Sons; 2004.Explanation:Naeglaria fowleri causes Primary Amebic Meni ngoenceph alitis PAM.Infection is acquired by swimming or diving in warm water contaminated with trophozoite and cysts.The trophozoites are neurotrophic - It ingests RBCs and brain tissue by phagocytosis - Production of amoebostome with cvtopathic enzymes - Acute hemorrhagic meningoencephalitis.Primary Amoebic MeningoencephalitisPAM mimics acute bacterial meningitisAbrupt in onset with acute fulminant courseCondition mostly fatal 