296 



THE ACTINOMYCETES, Vol. II 





t 





Figure 55. Micro, 

 growing in a compost. 



ipom (single sp 



Cellulose: Good growth and decomposi- 

 tion. 



Sucrose: Inverted. 



Nitrate reduction: Positive. 



Habitat: Soil. 



5. Micromonospora fusca Jensen, L932 

 (Jensen, H., Proc. Linnean Soc. N.S. Wales, 

 57: 178, 1932). 



Morphology: Growth heavy, compact, 

 orange-colored, rapidly changing to deep 

 brown and nearly black. Spore layer moist, 

 glistening, grayish to brownish-black. Spores 

 oval or spherical. 



Gelatin: Liquefaction slow. Soluble pig- 

 ment very slight. 



Milk: No coagulation, slow peptonization; 

 grayish-brown discoloration of milk. 



Starch: Hydrolyzed. 



Cellulose: Limited decomposition. 



Nitrate reduction: Positive or negative. 



Sucrose: Inverted. 



Antagonistic properties: Produces the 

 antibiot ic micromonosporin. 



Source: Soil. 



('). Micromonospora gallica (Erikson, L935) 

 Waksman (Erikson, I). Med. Pes. Council, 

 London, Pub. No. 4582, L935, p. 24). 



Morphology: Aerial hyphae retarded and 

 rudimentary. Typical single spores produced. 



Sucrose nitrate 1 agar: No growth. 



( Uycerol agar: No growth. 



( Hucose agar: No growth. 



Potato agar: Growth pale pink, moist, 

 granular. 



Potato: Growth slow in form of pink, 

 translucent colonies, tending to become 

 umbilicated and heaped up. 



Egg media: Colonies minute, becoming 

 confluent , tangerine-colored. 



Blood agar: Colonies minute, discrete, 

 pink. No hemolysis. 



Gelatin: Growth scant, irregular, pink. 

 Liquefaction slow. 



Broth: Pinkish flakes. Small rounded red 

 granules at bottom. 



Milk: Surface ring yellowish-pink. Positive 

 coagulation and peptonization. 



Habitat: Isolated from blood culture. 



7. Micromonospora globosa Krassilnikov, 

 L939 (Krassilnikov, X. A. Mikrobiologiya 8 : 

 179, 1939; Actinomycetes. Izvest. Akad. 

 Nauk, SSSP, Moskau, 1941, p. 129). 



Morphology: Spores spherical, 1.0 m, ar- 

 ranged in clusters on long branching sporo- 

 phores. 



Agar media: Growth at first colorless, 

 leathery, lichenoid; covered with a dark 

 brownish tarnish of spores. 



Gelatin: Liquefaction slight. 



Milk: Coagulated and peptonized. 



Starch: Hydrolyzed. 



Cellulose: Satisfactory growth. 



Nitrate reduction: Positive. 



Sucrose: Inverted. 



Source: Soil. 



8. Micromonospora parva Jensen, L932 

 (Jensen, H. Proc Linnean Soc. X.S. Wales 

 57: 177, 1932). 



Morphology: Growth pale pink to orange, 

 compact. Substrate mycelium thin, spread- 

 ing widely into the agar. Sporulation scant, 

 giving rise to thin, grayish, moist crusts on 

 the surface. Spores oval; in mass gray- 

 colored. 



Gelatin: Liquefied slowly. 



Milk: Unchanged; or coagulated and 

 slowly peptonized with faintly acid reaction. 



Starch: Hydrolyzed. 



