<prompt> Amphotericin-B is obtained from:Streptomyces nodosusStreptomyces pimprinaStreptomyces nousseriStreptomyces fragilis  <response>: POLYENE ANTI BIOTICS The name polyene is derived from their highly double-bonded structure. Amphotericin B is described as the prototype. Amphotericin B AMB: It is obtained from Streptomyces nodosus ESSENTIALS OF MEDICAL PHARMACOLOGY K.D.TRIPATHI SIXTH EDITION PAGE NO:757 