lysinibacillus contaminans lysinibacillus contaminans lysinibacillus contaminans is a gram-positive, aerobic and endospore-forming bacterium from the genus of lysinibacillus which has been isolated from surface water. lysinibacillus contaminans scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: lysinibacillus species: l. contaminans binomial name lysinibacillus contaminanskämpfer et al. 2013 type strain fst3a