Naegleria fowleri (amoeba) infects people when water containing "Amoba Parasites" enters to a person's body through nose or mouth. The Amoeba then works its way to the central nervous system, and once it's there it causes destruction. It damages our brain tissue by which the nervous system destroys and the person dies. It cannot infect us by drinking contaminated water. In very rare cases, Amoeba infections may occur when water from other sources which contain this infection enters the nose or moth (usually while swimming in non-chlorinated water). It reproduces automatically and rapidly in warm water bodies.