Actinomadura nitritigenes sp. nov., Isolated from Experimental Biofilters

We describe a new species of the genus Actinomadura for four nitrite-producing strains which were isolated from experimental biofilters that had been supplied with ammonia. The whole cells of these strains contain meso-diaminopimelic acid, ribose, madurose, glucose, and galactose. The polar lipids include diphosphatidylglycerol, phosphatidylinositol, and phosphatidylinositol mannosides. The main menaquinone is MK-9(H6). The fatty acids include hexadecanoic acid and 10-methyloctadecanoic acid. The guanine-plus-cytosine content of the DNA is 74 mol%. The fatty acid composition, morphology, and physiological reaction profiles of these strains differentiate them from previously described species. The name proposed for the new species is Actinomadura nitritigenes.