ANTIBIOTIC A-35512 MIXTURE,ITS FACTORS AND THEIR ACID ADDITION SALTS,PROCESS FOR PRODUCING THEM AND A FEED COMPOSITION COMPRISING THEM

摘要

Antibiotic A-35512 complex, comprising microbiologically active, related factors A, B, C, E and H, is produced by submerged aerobic fermentation of Streptomyces candidus NRRL 8156. The individual A-35512 factors are separated and isolated by chromatography. The A-35512 antibiotics are antibacterial and growth-promoting agents and increase feed-utilization efficiency in animals. In addition, A-35512 factor B is useful in the treatment of dental caries and acne.