1887

Abstract

SUMMARY: The growth and amylase activity of a streptomycin-dependent on starch agar plates was gradually decreased with decrease of the streptomycin-concentration. The concentrations of streptomycin and the streptomycin- antagonizing properties of bacterial products also could be assayed by a cup plate method. The diameters of the zones of decomposed starch around the cups were proportional to the logarithms of streptomycin concentration. In the presence of a constant concentration of streptomycin they were inversely proportional to the concentration of bacterial antagonist. The following species and genera of microorganisms produced antagonists (in decreasing order of their activity): sp., , sp., and some strains of the genera and No inhibitory effects were observed with products of A and B, sp.,

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/content/journal/micro/10.1099/00221287-20-1-54
1959-02-01
2021-07-25
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