Primary amoebic meningoencephalitis (PAM) is a rare and usually deadly disease caused by an amoeba, Naegleria fowleri. This microscopic animal is found worldwide and is rather common, but the infection is rare. The infection occurs when the amoeba enters the body through the nose. This occurs when an individual is swimming or diving. The amoeba then travels to the brain and destroys the organ. Although the risk of contracting this disease is rare, some prevention is worth practicing when swimming in any natural body of water, including TRWD lakes and the Trinity River. Click here to read more.