Abstract
In the field of antibiotic microorganisms streptomyces has been studied most extensively concerning its antibiotic properties. In our laboratory many antibiotic strains have been isolated, and some of their antibiotic have been identified as Actinomycin A, Streptomycin, Streptothricin-group substances, Chloromycetin and Grisein. It seems, however, that there are more other antibiotic substances in this field.
Although the nature of the antibiotic substances of our strains has been and even now is being studied in detail, the characters of the strains have not yet been studied sufficiently. So I undertook the work of classifying these strains. In this paper the characters of our Chloromycetin-producing strain are described.
In regard to the classification of Actinomycetales, a splendid and systhematic description by Waksman was published in Journal of Soil Science (1919) and recently a new classification by him and Henrici has appeared in Journal of Bacteriology (1945) - In my classification studies chiefly these two papers and original descriptions of each species have been referred.
