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LL-E19020 alpha and beta, animal growth promoting antibiotics: taxonomy, fermentation and biological activity
W M Maiese1, M P Lechevalier, H A Lechevalier
1Medical Research Division, American Cyanamid Company, Lederle Laboratory, Pearl River, New York 10965.
The Journal of Antibiotics
|October 1, 1989
Abstract:
Antibacterial antibiotics LL-E19020 alpha and beta were isolated from the fermentation broth of an actinomycete strain. Based on cultural and physiological characteristics, culture LL-E19020 was identified as a new subspecies of Streptomyces lydicus. The LL-E19020 alpha and beta antibiotics were found to possess a very narrow antibacterial spectrum against human pathogens. In studies in chickens, LL-E19020 alpha demonstrated excellent growth promoting activity.