| abstract |
Antibiotic A47934 of formulan is produced by submerged, aerobic fermentation of new Streptomyces toyocaensis NRRL 15009 in a culture containing assimilable sources of carbon, nitrogen, and inorganic salts, and is active against gram-positive bacteria in vitro and in vivo, and also promotes growth in poultry and swine and serves to enhance feed efficiency in ruminant animals having a developed rumen. |