FAMILY III. STREPTOMYCETACEAE 



789 



tinomycetes, Izd. Akad. Nauk, U.S.S.R., 

 Moskau, 1941, 51; Waksman, in Waksmari 

 and Lechevalier, Actinomycetes and Their 

 Antibiotics, Baltimore, 1953, 84.) 



fa.ri.no'sus. L. adj. /amiosws mealy. 



Vegetative growth: Colorless, smooth or 

 rough colonies. 



Aerial mycelium: Powdery white on some 

 media. Sporophores straight or wavy, singly 

 or in clumps, forming no spirals. Organism 

 produces segmented spores or oidiospores, 

 cylindrical, 0.6 to 0.8 by 1.2 to 1.7 microns. 

 Some form ellipsoidal or even spherical 

 spores produced by swelling of cylindrical 

 forms. 



Gelatin: Liquefaction. 



Synthetic agar: Aerial mycelium poorly 

 developed and spotty. 



Milk: Coagulated and rapidly peptonized. 



Potato: Colorless growth. Aerial my- 

 celium poorly developed. 



Sucrose readily inverted by most strains. 



Starch is actively hydrolyzed. 



Some strains grow on cellulose. 



Nitrites weakly produced from nitrates. 



Antagonistic properties: None or verj' 

 weak. 



Source: Isolated from soil. 



Habitat: Soil. 



81. Streptomyces albidus (Duche, 1934) 

 Waksman, 1953. {Actinomyces albidus 

 Duche, Encyclop^die Mycologique, Paris, 

 6, 1934, 266; Waksman, in Waksman and Le- 

 chevalier, Actinomycetes and Their Anti- 

 biotics, Baltimore, 1953, 84.) 



al'bi.dus. L. adj. albidus white. 



Aerial mycelium: Whitish but not snow- 

 white. Sporophores long, open spirals. 

 Spherical to ellipsoidal spores. Soluble pig- 

 ment produced in synthetic and other 

 media. 



Gelatin: Cream-colored growth. No sol- 

 uble pigment. Rapid liquefaction. 



Agar: Colorless growth with slightly 

 greenish reverse. Aerial mj^celium white. 

 Soluble yellowish pigment. 



Synthetic agar: Colorless growth; some 

 drops of colorless guttation. Aerial my- 

 celium white. Yellowish pigment. 



Milk: Cream-colored growth. Weakly co- 

 agulated, rapidlj' peptonized. Cheesy odor. 



Potato: Flat, colorless growth. Aerial 

 mycelium white. No soluble pigment. 



Starch is actively hydrolj'zed. 



Good growth on cellulose. 



Nitrites slowly produced from nitrates. 



Odor: Strong, earthy. 



Antagonistic properties: Strong. 



Relationships to other species: Closely 

 related to Streptomyces albus but differs 

 from it by its more delicate growth and by 

 its reverse that is often yellowish brown. 

 Also related to Streptomyces microflavus 

 Krainsky but differs from Krainsky's or- 

 ganism in that its growth is never rose-yel- 

 low and by its abundant growth on potato. 



Source: The original culture was obtained 

 under the name of Actinomyces microflavus 

 (not Actinomyces microflavus Krainsky) 

 from the Baarn Culture Collection. 



Habitat: Unknown. 



82. Streptomyces cinnamoneus Bene- 

 dict, 1953. {Streptomyces cinnamoneus Bene- 

 dict, Dvonch, Shotwell, Pridham and Lin- 

 denfelser {nomen nudum), Antibiotics and 

 Chemotherapy, 2, 1952, 591; Benedict, in 

 Waksman and Lechevalier, Actinomycetes 

 and Their Antibiotics, Baltimore, 1953, 85.) 



cin.na.mo'ne.us. Gr. neut.n. cinnamon 

 cinnamon; M.L. adj. cinnamoneus pertain- 

 ing to cinnamon. 



Description prepared by R. G. Benedict 

 for use in Waksman and Lechevalier, Ac- 

 tinomycetes and Their Antibiotics, Balti- 

 more, 1953. 



Vegetative growth: Large colonies with 

 irregular margins. 



Aerial mycelium: White, graduallj- chang- 

 ing to flesh color. No spirals. Spores globose, 

 0.6 micron in diameter. 



Gelatin: White flocculent growth. No 

 aerial mycelium. No soluble pigment. Rapid 

 liquefaction. 



Agar: Cream to light lemon-j^ellow 

 growth. No aerial mycelium. 



Synthetic agar: Colorless to white to 

 cream-colored growth. Aerial mycelium 

 white to light cinnamon. 



Starch: Colorless to brownish growth. 

 Aerial mycelium white. 



Glucose agar: Colorless growth with light 

 greenish yellow to dull yellowish orange 



