DESCRIPTION OF SPECIES OF STREPTOMYCES 



2 15 



oped, white or grayish- white. No soluble 

 pigment. 



Gelatin: Growth colorless. Aerial myce- 

 lium pale gull-gray. Soluble pigment absent, 

 yellow. Liquefaction moderate. 



.Milk: Growth good, colorless to white. 

 Peptonization and coagulation rapid. 



Nitrate reduction: Negative. 



Antagonistic properties: Produces an 

 antibiotic, mikamycin, active against gram- 

 positive and acid-fast bacteria. 



158. Streptomyces murinus Frommer 

 (Frommer, \Y. Arch. Mikrobiol. 32: 198, 

 L959). 



Morphology: Sporophores small, mono- 

 podially branched, tree-like; spirals com- 

 pact, with 1 to 3 turns. 



Glycerol nitrate agar: Growth greenish- 

 yellow. Aerial mycelium thin, white. Soluble 

 pigment greenish-yellow. 



Glycerol-glycine agar: Growth yellow 

 to brown-yellow. Aerial mycelium white- 

 gray to gray-brown. Soluble pigment golden 

 yellow. 



Glucose-asparagine agar: Growth yellow, 

 occasionally brown-violet. Aerial mycelium 

 powdery white to gray-white. Soluble pig- 

 ment yellow to greenish-yellow. 



Calcium malate agar: Growth colorless. 

 Aerial mycelium white. No soluble pigment. 



Nutrient agar: Growth yellow to green- 

 ish-yellow. Aerial mycelium lacking or 

 white. Soluble pigmenl lacking or golden 

 yellow. 



Starch media: Growth colorless to yellow- 

 ish. Aerial mycelium gray-brown. No hy- 

 drolysis after 10 days. 



Potato: Growth abundant, golden brown. 

 Aerial mycelium cream-colored to yellow. 

 Soluble pigment questionable. 



Gelatin: Growth abundant, golden yellow. 

 Aerial mycelium cream-colored to gray. 

 Soluble pigment yellow to golden yellow. 

 Liquefaction limited. Melanin-negative. 



Milk: Growth abundant, golden yellow to 



yellow-brown. Aerial mycelium powdery, 



cream-colored. Questionable coagulation and 

 liquefaction. 



Cellulose: Growth weak. Aerial mycelium 

 gray-brown. Soluble pigmenl yellowish. 



Antagonistic properties: Produces actino- 

 mycin. 



l.")«). Streptomyces naganishi Yamaguchi 

 and Saburi, 1955 (Yamaguchi, '1'. and 

 Saburi, Y. J. Gen. Appl. Microbiol. I: 201 

 235, 1955). 



Morphology: Sporophores straight with 

 many compact spirals and a few open 

 spirals; spores oval to short rods, 0.8 to 1.4 

 by 0.5 to 0.7 m- 



Sucrose nitrate agar: Growth colorless, 

 thin. Aerial mycelium powdery, at first 

 white, later colored buff. No soluble pig- 

 ment . 



Calcium malate agar: Growth is at first 

 pinkish-white to pinkish-gray, later becom- 

 ing whitish-brown. Aerial mycelium whitish. 

 Soluble pigment light pink, but soon disap- 

 pears. 



Nutrient agar: Growth at first colorless 

 to dark cream, later becoming yellowish- 

 brown to brown. No aerial mycelium. Solu- 

 ble pigment light brown. Melanin-negative. 



Starch agar: Growth colorless to creamy 

 with reddish-purple portion. Aerial myce- 

 lium abundant, white or smoke-gray to light 

 drab. Soluble pigment absent or faint pink. 

 Good hydrolysis. 



Potato: Growth vigorous, at first yellow- 

 ish-gray. Aerial mycelium white to grayish- 

 white. Soluble pigment deep purple to black. 



Gelatin: Growth dark brown with some 

 tint of olive. Soluble pigment deep brown 

 and a more diffusible yellowish-green. Lique- 

 faction moderate. 



Milk: Growth vigorous, yellowish-brown, 

 with white aerial mycelium along the glass. 

 Soluble pigment light brown, sometimes 

 reddish-brown. Coagulation and peptoniza- 

 tion. 



