Streptomycin production has been found in species of S. griseus (Krainsky) Waksman et Henrici, (A. globisporus Krassilnikov), S. bikiniensis Johnstone et Waksman, S. mashuensis Sawazaki at al¹⁾. Hydroxystreptomycin was isolated from the fermentation broth of S. griseocarneus Benedict et al. by Benedict et al.²⁾ and independently by Grundy et al.³⁾ and from that of S. reticuli-like organism by Hosoya et. al.⁴⁾ Dihydrostreptomycin was isolated from the broth of S. humidus Nakazawa at al. by Nakazawa et al. Recently, a characteristic streptomyces different from other known species was found to produce streptomycin as reported in previous paper⁸⁾ and given the name of S. galbus nov. sp. Okami et Umezawa on the basis of its characteristic yellow color of growth.

In this paper, description of S. galbus nov. sp. and some remarks on the species producing streptomycin-group antibiotics are presented.