FIELD: medicine.
SUBSTANCE: Amycolatopsis fructiferi subsp. ristomycini 8765 strain comes from mutant transformation of Proactinomyces fructiferi var. ristomycini 5339 strain properties as a result of consequent three-step actions on the stock strain by methylnitrosoguanidine, ultraviolet and gamma-radiation of 60Co with following selection of mutated strain possessing increased antibiotic activity. Obtained strain differs from already known one with growth form on diagnostic agar media, carbon sources assimilation rate (saccharose, starch, rhamnose, and mannose) chromogenic ability and antibiotic activity which is 5 times higher of Proactinomyces fructiferi var. ristomycini 5339 strain activity and is equal to 2000 mcg/ml. Strain is deposited to All Russian Collection of Industrial Microorganisms, collection # S1085.
EFFECT: invention can be used in medical industry for antibacterial antibiotic ristomycin manufacture; ristomycin is effective in treatment of infections induced by gram-positive microorganisms.
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