Miteralis is referred to in a scan taken in Metroid Prime. It is said to be a sentient gaseous Global Exterminator virus that has infected the planet Bilium within the FS-176 System. Circumstances seem to indicate that the virus is artificial and was intentionally introduced into the environment of Bilium, but this is an unconfirmed statement. Without a doubt, this virus will render the surface of Bilium completely uninhabitable, and destroy all of the native life. The infection of Bilium is the only known case involving the use of this global virus.