Brain inflammation (meningoencephalitis). Coloured transmission electron micrograph (TEM) of several Naegleria fowleri protozoan microbes (yellow) in the brain. A blood vessel is seen running from bottom right to centre left with red blood cells (red) and white blood cells (pale blue). N. fowleri caused the meningoencephalitis, which is the inflammation of the brain and its membranes. Infection is by inhalation, often by children when swimming in fresh water. Headaches, vomiting, and sensory disturbances are followed by death unless aggressive drug therapy is used. Magnification: x2000 when printed 10cm high.