The producer strain IMV-70, related to the genus Streptomyces,
was isolated in the year 2000, at the Institute of
Microbiology and Virology MES RK. The optimal media
for biosynthesis of the antibiotic A-70 were found to be the
organic media with yeast and corn extracts, as well as soy,
pea, and oat flour. The antibiotic was formed at the highest
rate in the medium with yeast extract and peptone on the
4th–7th day of fermentation and will be described in greater
detail below