sporosarcina contaminans sporosarcina contaminans sporosarcina contaminans is a gram-positive and endospore-forming bacterium from the genus of sporosarcina which has been isolated from an industrial clean-room floor from göteborg in sweden. sporosarcina contaminans scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: planococcaceae genus: sporosarcina species: s. contaminans binomial name sporosarcina contaminanskämpfer et al. 2010 type strain ccug 53915, dsm 22204, ccug 53915