Antibiotics LL-E19020 alpha and LL-E19020 beta, process for their preparation, biologically pure Streptomyces lydicus-culture method for increasing the growth rate of meat-producing animals and fish, increasing the feed utilization efficiency and / or improving lactation in lactating ruminant animal feed and composition for the treatment or prevention of protozoal infections

摘要

This invention relates to antibiotic LL-E19020 alpha and LL-E19020 beta derived from the microorganism Streptomyces lydicus subspecies tanzanius NRRL 18036, which are useful as an antibacterial agent. The antibiotics LL-E19020 alpha and LL-E19020 beta are also growth promoters, antiprotozoan agents and anthelmintic agents.