This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology, Subject name: Microbiology
Primary amoebic meningitis caused by: 
Select and explain. 
A. Naegleri fowleri, B. E. histolytic, C. E. coli, D. B. coli
A: Naegleri fowleri
Answer: A: Naegleri fowleri 
Explanation: Ans. is 'a' i.e., Naegleri fowleriPathogenic free living Amoeba (BAN)1. Naegieria fowleri - Acute and fulminating primary amoebic meningoencephalitis (PAM).2. Acanthamoeba - Ulcerative keratitis and granulomatous amoebic encephalitis (GAE).3. Balamuthia (Rare) - Chronic granulomatous amoebic encephalitis.