SPECIES OF STREPTOMYCES 79 



Gelatin: Growth fair. White aerial mycelium. Light yellow soluble pig- 

 ment. Medium liquefaction. 



Milk: Surface ring white, with yellow-green to light yellow-brown below 

 surface. White aerial mycelium. Slow peptonization. 



Starch: Growth good. White to pale olive-buff aerial mycelium. Black 

 soluble pigment. Good hydrolysis. 



Cellulose: No growth. 



Antagonistic properties: Produces puromycin, an antibiotic active upon 

 certain protozoa and certain gram-positive bacteria. 



70. Streptomyces abikoensum Umezawa, Tazaki, and Fukuyama. 

 (Umezawa, H., Tazaki, T., and Fukuyama, S., Japan. Med. J., 4, 1951, 

 331-346; J. Antibiotics [Japan], 5, 1952, 469; Okami, Y. ibid. 477-480.) 



Vegetative growth: In separate colonies with very thin yellow aerial 

 mycelium. Submerged mycelium yellow or yellowish brown. Soluble pig- 

 ment yellowish brown. 



Aerial mycelium: Microscopically short, unbranched, bearing a straight 

 conidia chain. 



Nutrient agar: Isolated colonies; growth cream-colored, with triangular 

 hole in the center. No aerial mycelium. Soluble pigment brown. 



Gelation: Liquefaction crateriform. Growth cream-colored or brown; sol- 

 uble pigment brown. 



Milk: Growth slight, brown; aerial mycelium white; soluble pigment 

 yellowish brown. Peptonization. 



Starch: Hydrolysis. 



Nitrate: No reduction. 



Blood agar: Growth dark cream-yellow. Hemolysis strong. 



Carrot: Growth slight, wrinkled, brownish cream-colored; aerial myce- 

 lium yellowish white. Pigment brown. 



Egg: Growth greenish yellow, without aerial mycelium and with spread- 

 ing reddish violet pigment. 



Loeffler's coagulated serum: Growth cream-colored; no aerial myce- 

 lium. No hydrolysis. Pigment brown. 



Antagonistic properties: Produces an antiviral agent, abikoviromycin. 



Remarks: No tyrosinase produced. Culture utilizes glucose, maltose, and 

 glycerol, but not arabinose, xylose, rbamnose, fructose, galactose, mannitol, 

 sorbitol, lactose, sucrose, raffinose, and inulin. 



71. Streptomyces odorifer (Rullman emend. Lachner-Sandoval) comb, 

 nov. (Lachner-Sandoval, V., Ueber Strahlenpilze, Strassburg, 1898. Rull- 

 man, W. Centrbl. Bakt. I, 79, 1917, 383-390.) 



Vegetative growth: Colorless, folded. 



Aerial mycelium: Well-developed, white or light gray. Sporophores long, 



