<prompt> Acute Primary Amoebic meningoencephalitis true is-Meningitis caused by acanthamoeba species is acute in natureDiagnosis is by demonstration of trophozoite in CSFCaused by faeco-oral transmissionMore common in tropical climate  <response>: Diagnosis of acute primary amoebic meningoencephalitis is established by microscopic examination of the cerebrospinal fluid which contains trophozoite and red cells but no bacteria.About other optionsAcanthamoeba causes chronic meningoencephalitis, while Naegleria fowleri is responsible for acute cases of meningoencephalitis.The cases are seen in children who swim or dive in warm, soil contaminated pools in temperate regions e.g. in Europe and N. America.The amoebas enter via the nose and the cribriform plate of the ethmoid passing directly into the brain tissue where they form nests of amoebas that cause extensive hemorrhage and damage, chiefly in the basilar portion of the cerebrum and cerebellum. 