58 ACTINOMYCETES 



Synthetic solution: Cream-colored punctiform growth with yellowish 

 aerial mycelium; no soluble pigment. 



Nutrient solution: Growth whitish, flakes throughout liquid; yellowish 

 pigment. 



Tyrosine medium: Growth white with yellowish reverse; yellowish soluble 

 pigment. 



Coagulated serum: Growth cream-colored, with whitish aerial mycelium; 

 liquef action rapid. 



Antagonistic properties: Positive. 



Remarks: Abundant growth on neutral and acid media; whitish aerial 

 mycelium; marked odor; soluble brownish red pigment. This species seems 

 to form the transition type between the Streptomyces albus group and the 

 Streptomyces chromogenus group. 



36. Streptomyces felleus Lindenbein (Lindenbein, W., Arch. Mikro- 

 biol.,J7, 1952,361-383.) 



Aerial mycelium: Hyphae, long, straight, branching. Spores spherical. 



Synthetic agar: Growth good, effusive, smooth, with yellow-brown re- 

 verse. Aerial mycelium velvety gray-white. Soluble pigment yellowish 

 brown. 



Nutrient agar: Growth colorless, diffuse; brownish yellow reverse. No 

 aerial mycelium. Soluble pigment light brownish yellow. 



Glucose agar: Growth good, effused, crumb-like, yellowish brown. Aerial 

 mycelium powdery gray-white. Soluble pigment light brown. 



Potato: Growth strong, brownish yellow. Aerial mycelium powdery. 

 Faint reddish pigment around growth. 



Gelatin: Growth colorless. No aerial mycelium. No soluble pigment. No 

 liquefaction. 



Milk: Growth good, brownish to orange. Aerial mycelium velvety gray- 

 white. Peptonization medium. 



Starch: Growth lichnoid, colorless. Aerial mycelium powdery white. No 

 soluble pigment. Hydrolysis strong. 



Cellulose: No growth. 



Glucose broth : Fine sediment with some flakes. Later a colorless ring on 

 surface. No aerial mycelium and no soluble pigment. 



Glucose-asparagine agar: Growth thin, colorless, with yellowish reverse. 

 Aerial mycelium powdery gray-white. Soluble pigment brownish. 



Calcium malate agar: Growth crumb-like, colorless to yellowish. Aerial 

 mycelium powdery gray- white. Soluble pigment yellowish brown. 



Odor: Typical earthy. 



Antagonistic properties: Produces picromycin. 



