| 摘要 |
of the Invention A hitherto undescribed microorganism, Streptomyces virqiniae NRRL 12525, which upon culturing produces the A41030 antibiotic complex comprising several factors. The A41030 antibiotics produced show anti-bacterial activity against the gram-positive genera Staphylococcus and Streptococcus which are resistant to penicillin. In addition, these antibiotics act to promote growth and improve feed efficiency in ruminant animals, poultry and swine, and other livestock, and to improve milk production in ruminant animals. |
