shewanella decolorationis shewanella decolorationis shewanella decolorationis is a gram-negative, dye-decolorizing bacterium first isolated from activated sludge of a waste-water treatment plant. it is motile by means of a single polar flagellum. the type strain is s12t (=cctcc m 203093t =iam 15094t). its genome has been sequenced. shewanella decolorationis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: shewanellaceae genus: shewanella species: s. decolorationis binomial name shewanella decolorationisxu et al. 2005