A patient presents with headache, high fever and meningismus. Within 3 days he becomes unconscious. Most probable causative agent ?

Ans. is 'a' i.e., Naegleria fowleri Amongst the given options Naeglaria and Acanthamoeba cause amoebic encephalitis. "The prognosis of Naeglaria encephalitis is uniformaly poor, most patients die within a week". "Acanthamoeba encephalitis follows a more indolent course".