Bacteria is a band of musicians from All That that look and perform songs that are titled for 'bacteria'-themed substances. The band consists of Maggot (played by Josh Server) on lead guitar, Rash (played by Alisa Reyes) on guitar, and Spew (played by Kenan Thompson) on drums. In one sketch taking place at Dullmont Junior High School, Maggot mentioned that Bacteria got its name when Spew hadn't bathed in 3 1/2 years where the rest of the info was cut off by Miss Fingerly before Maggot can go into further details on why the band is called Bacteria. In Season 4, Maggot and Spew held an audition for a replacement member after Rash quit the band and they ended up with Bwah (played by Danny Tamberelli).

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