DESCRIPTION OF SIMX.'IKS OF STREPTOMYCES 



211. Streptomyces roseocitreus Kato, I'.'");! 

 (Kato, II. J. Antibiotics (Japan) 6A: L43; 

 6B: 206-208, L953). 



Morphology: Sporophores produce nu- 

 merous open and closed spirals of the dex- 

 trorse type. Spores oval, 1.2 to l.."> by L.6 to 

 LS M . 



Sucrose nitrate agar: Growth pale olive- 

 buff, later changing to deep olive-buff, ivory- 

 yellow, <>r colonial huff. Aerial mycelium 

 scant, white. Soluble pigmenl at first faint 

 creamy, later changing to colonial huff. 



Glycerol-calcium malate agar: Growth at 

 first transparent with gray to blackish-blue 

 patches, later becoming light yellowish- 

 olive to reed-yellow. Aerial mycelium thin, 

 white, at lirst having tinge of gray. Soluble 

 pigment yellowish with tinge of green. 



Nutrient agar: Growth olive-buff, later 

 changing to deep olive-buff with bluish 

 patches. No aerial mycelium. Soluble pig- 

 ment brown. 



Starch agar: Growth hyaline, cottony, 

 reverse becoming faint bluish. Aerial myce- 

 lium white, later becoming livid pink, and 

 finally pale grayish-vinaceous. Enzymatic 

 zone fair to good. 



Potato: Growth thick, folded, pale olive- 

 buff, later deep olive to dark olive. Aerial 

 mycelium at first white, later becoming livid 

 pink to vinaceous-buff. Color of plug black- 

 ish-brown. 



Gelatin: Whitish colonies on surface of 

 tube. Aerial mycelium scant, white. Soluble 

 pigment brown. Liquefaction slow. 



Milk: Growth in yellow ring with patches. 

 Soluble pigment yellowish. Xo coagulation; 

 peptonization slow. 



( 'ellulose: Xo growth. 



Carbon utilization: Utilizes sucrose, L- 

 arabinose, D-sorbitol, salicin, and sodium 

 acetate; not sodium succinate. 



Antagonistic properties: Produces anti- 

 biotics roseociti'in A and B. 



Habitat: Soil. 



212. Streptomyces roseodiastaticus (Duche, 



L934 ) now comb. ( I )uche, J. Les actinomyces 

 du groupe albus. P. Lechevalier, Paris, 

 p. 329, L934). 



Morphology: Growth consists of fine my- 

 celium 0.5 to 0.7 fj. in diameter. Aerial my- 

 celium of larger diameter, but usually less 

 than 1 ju. 



Glucose nitrate agar: Growth limited, 

 cream-colored, becoming white with a 

 brownish reverse; on prolonged incubation 

 the culture becomes rose-gray. Soluble pig- 

 ment brownish. 



Glycerol nitrate agar: Growth cream- 

 colored, becoming rose- violet ; reverse red. 



Asparagine agar: Growth cream-colored, 

 becoming rose-white; reverse of growth 

 reddish-brown. Soluble pigment yellow. 



Tyrosine medium: Pigment brownish, 

 later becoming brown. 



Gelatin: Liquefied. Xo soluble pigment. 

 Melanin-negative. 



Potato: Growth cream-colored, becoming 

 brownish-white. Soluble pigment brown, 

 only in presence of glycerol. 



Milk: Growth limited. Peptonization 

 slow. 



Starch: Diastatic action weak. 



Remarks: Closely related to N. halstedii 

 and considered as a transitional form. Ac- 

 cording to Ettlinger el ol. (1958), this or- 

 ganism is related to S. griseus. 



2b"). Streptomyces roseoflavus Arai, 1 ( .).">1 

 (Arai, T. J. Antibiotics (Japan) 4: 215 221, 

 L951 ). 



Morphology: Sporophores form spirals. 

 Spores oval to oblong, 0.X to 1.0 by 1.0 to 



1.8 m- 



Sucrose nitrate agar: Growth colorless to 

 yellowish. Aerial mycelium powdery, white 

 to yellow-rose. 



Glucose-asparagine agar: Growth color- 

 less to yellowish-white. Aerial mycelium 

 rose-colored. 



Xutrient agar: Growth much folded, 

 white-gray to golden yellow. Aerial myce- 



