a novel compound , called chloropolysporin , has antibiotic properties and would appear to be a member of the class of glycopeptide antibiotics containing chlorine . it may be produced by cultivating a suitable strain of microorganism of the genus micropolyspora , especially micropolyspora sp . sank 60983 . it may be combined with conventional pharmaceutically acceptable carriers or diluents for therapeutic use or incorporated into edible excipients , such as feed or water , for use as a growth - promoting agent , especially for farm animals .