title: The description and antibiotic production of Streptomyces hygroscopicus var. Geldanus.
abstract: A new variety of Streptomyces hygroscopicus was isolated from a Kalamazoo soil. This isolate is described and identified as var. geldanus. When fermented in preferential media it produces geldanamycin, nigericin, nocardamine, and a libanamycin-like activity. Fermentation conditions, chromatographic separation, and antimicrobial spectra of the antibiotics are given.
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D003116:Color; D003470:Culture Media; D005285:Fermentation; D013302:Streptomyces / Q000166:cytology / Q000254:growth & development / Q000378:metabolism
chemical_list: D000900:Anti-Bacterial Agents; D003470:Culture Media