FAMILY III. STREPTOMYCETACEAE 



805 



growth. Aerial mycelium white to drab. 

 Soluble, cinnamon-buff to brown pigment. 



Nutrient potato agar: Wrinkled, gray to 

 grayish-olive growth. Trace of aerial myce- 

 lium. Soluble, deep golden brown pigment. 



Glycerol synthetic solution: Growth in 

 form of compact colonies at bottom and 

 along sides of tube with some on surface, 

 colored salmon to brown. Scant drab aerial 

 mycelium. Soluble, buff to golden pigment. 



Glucose broth: Sponge-like growth at 

 bottom of tube. Soluble deep, golden brown 

 pigment. 



Potato: Wrinkled, gray to orange to 

 brown growth. Aerial mj'celium gray to 

 olive-buff. Plug gray to brown. 



Starch is hydrolyzed. 



Tyrosinase reaction: Positive. 



Nitrites not produced from nitrates. 



Fair growth at 37.5° C. 



Source : Isolated from limed soil and from 

 the common scab of a potato. 



Habitat: Soil and potatoes so far as 

 known. 



119. Streptomyces fimbriatus (Millard 

 and Burr, 1926) Waksman, 1953. (Actino- 

 myces fimbriatus Millard and Burr, Ann. 

 Appl. Biol., 13, 1926, 601; Waksman, in 

 Waksman and Lechevalier, Actinomycetes 

 and Their Antibiotics, Baltimore, 1953, 104.) 



fim.bri.a'tus. L. adj. fimbriatus fibrous, 

 fringed. 



Vegetative growth: Chocolate-colored. 



Aerial mycelium: Mouse-gray. Sporo- 

 phores form spirals with 3 or more turns. 

 Spores cylindrical to ellipsoidal, 0.9 by 0.9 

 to 1.2 microns. 



Gelatin: Good growth with white aerial 

 mycelium. Soluble reddish pigment. Slow- 

 liquefaction. 



Synthetic sucrose agar: Gray growth. 

 Aerial mycelium abundant, white to gray, 

 with a few specks of white. Soluble, cream- 

 colored pigment. 



Synthetic glucose agar: Very good growth. 

 Aerial mycelium white to mouse-gray. 



Nutrient potato agar: Gray to blackish, 

 flat colonies with raised center; a few specks 

 of white aerial mycelium. Soluble, golden 

 l)rown pigment. 



Glycerol synthetic solution: Numerous 

 colonies covering surface of medium and 



throughout medium; aerial mycelium scant, 

 white. 



Glucose broth: Flocculated growth, 

 mostly at bottom. No aerial mycelium. 

 Soluble golden brown pigment. 



Milk: Good growth. Not coagulated and 

 not hydrolyzed. 



Potato: Mouse-gray growth. Aerial my- 

 celium on dried portions of growth scant, 

 white to mouse-gray. Black pigment around 

 growth. 



Starch is hydrolyzed. 



Tyrosinase reaction: Strongly positive. 



Nitrites produced from nitrates. 



Source: Isolated from a small, partly 

 ruptured potato scab. 



Habitat: Found in potatoes so far as 

 known. 



120. Streptomyces carnosus (Millard 

 and Burr, 1926) Waksman, 1953. (Actino- 

 myces carnosus Millard and Burr, Ann. Appl. 

 Biol., 13, 1926, 601; Waksman, in Waksman 

 and Lechevalier, Actinomycetes and Their 

 Antibiotics, Baltimore, 1953, 105.) 



car.no'sus. L. adj. carnosus pertaining to 

 flesh. 



Vegetative growth: Good, wrinkled 

 growth on synthetic and organic media. 



Aerial mycelium: White to gray. Spores 

 cylindrical, 0.75 by 1.0 micron. 



Gelatin: Growth covered with aerial 

 mycelium, white in center, gray in margin. 

 Rapid liquefaction. 



Synthetic sucrose agar: Pale smoke-gray 

 growth, covered with abundant, gray aerial 

 mycelium. Colorless guttation drops appear 

 over the whole surface. 



Synthetic glucose agar: Pale olive-gray 

 growth, covered with abundant, white to 

 gray aerial mycelium. Soluble, ivory-yellow 

 to cartridge -buff pigment. 



Nutrient potato agar: Heavy, lichenoid, 

 gray-colored growth. Aerial mycelium 

 scant, white to gray; property lost on culti- 

 vation. Light golden to brown pigment. 



Glycerol synthetic solution: Whitish to 

 gray, discrete colonies, clinging to side or 

 bottom of tube. Aerial mycelium scant, 

 pale gray. 



Glucose broth: Whitish, sponge-like 

 masses, sinking to bottom of tube. 



Milk: Good surface growth. No aerial 



