A patient presents with headache, high fever and meningismus. Within 3 days he becomes unconscious. Most probable causative agent ?
Naegleria fowleri
Acanthamoeba castellani
Entamoeba histolytica
Trypanosoma cruzi
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".