steroidobacter denitrificans steroidobacter denitrificans steroidobacter denitrificans is a gram-negative and motile bacterium from the genus of steroidobacter which has been isolated from anoxic sewage sludge from soers in germany. steroidobacter denitrificans has the ability to degrade steroid hormones. steroidobacter denitrificans scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: nevskiales family: steroidobacteraceae genus: steroidobacter species: s. denitrificans binomial name steroidobacter denitrificansfahrbach et al. 2008 type strain dsm 18526, jcm 14622, fs-2007, strain fs