Bacteria is known as Walter Mawuili Gli and is a hiplife artiste from the Volta region of Ghana. He is mostly famous for his hit, Maame. He gained more popularity after featuring in Lucky Mensah's Brofre nie.

He is part of the B-Squad which comprises of ragga artistes like Batman (Samini), Bandana, Borax and the late Terry Bonchaka.

Other songs include Mefrefre wo, Agyeiwaa, Dede, Benz and Agye Owuo.