Flesh-eating bacteria is a disease. The presence of this bacteria was initially revealed in the scan of the Zoomer in Metroid Prime Hunters. The Zoomer is well known for carrying these bacteria, and since it has migrated to many planets through means of stowing away on board visiting star ships, the flesh-eating bacteria has consequently spread to each of the environments it was newly introduced to; these strains of bacteria decimated the populations of native wildlife of Zebes.