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
Parasitic Encephalitis is caused by - 
Select and explain. 
A. Naegleria, B. Acant amoeba, C. Balamuthia, D. Gnathostoma
A: Naegleria
Answer: A: Naegleria 
Explanation: Naegleia fowleri The amoeboid form enters the human body through nasal mucosa. The parasite invade the cribriform plate and travels along the olfactory nerve to brain leading to a rapidly fatal infection known as primary amoebic meningoencephalitis It occurs in young adults and children with arecent history of swimming in fresh water (refer pgno:25 baveja 3rd edition)