| 摘要 |
The invention provides a combination treatment for ruminants to synergistically enhance the growth rate thereof and improve the efficiency of feed utilization thereby. The treatment involves, orally administering a growth-enhancing amount of the antibiotic AV290, antibiotic AV290 sulfate, antibiotic AV290-syntan complex, antibiotic AV290-alkylsulfate complex and/or antibiotic AV290 alkylated derivative, to ruminants which have been parenterally or orally treated with a growth-enhancing amount of certain selected steroids or steroidal compositions. |
