DESCRIPTION OF SPECIES OF STREPTOMYCES 



251 



Antagonistic properties: Produces an 

 antifungal agent, nystatin. 

 Type culture: [MRU .".771. 



171. Streptomyces novaecaesarecu (Waks- 

 nwiii and Curtis, L916) Waksman and Hen- 

 rici, 1948 (Waksman, S. A. and Curtis, 1!. E. 

 Soil Sci. 1: 111, 1916, 8: 158, 1919). 



Morphology: Aerial mycelium forms both 

 straight and spiral (dextrorse) sporophores. 

 Spores oval to elongate. 



Sucrose nitrate agar: Growth gray, he- 

 coming bluish, glossy, much wrinkled. Aerial 

 mycelium white, appears late. Soluble pur- 

 ple pigment formed. 



Glucose-asparagine agar: Growth re- 

 stricted, gray, becoming red. 



Nutrient agar: Growth thin, cream-col- 

 ored. 



Potato: Growth wrinkled, cream-colored, 

 turning yellowish. [Melanin-negative. 



Gelatin: Surface colonies small, cream- 

 colored. Liquefaction slow. 



Milk: Gray ring. Coagulation slow; pep- 

 tonization slow. 



Starch agar: Colonies restricted, circular, 

 bluish-violet. Positive hydrolysis. 



Nitrate reduction: Positive. 



Production of H>S: Negative. 



Temperature: Optimum, 37°C. 



Antagonistic properties: Negative. 



Remarks: At first this organism was des- 

 ignated as A. violaceus-caesari. This species 

 is considered by Krassilnikov as synonymous 

 with A. violaceus (Rossi-Doria) Gasperini. 

 It appears to be related to S. violaceorubt r . 



172. Streptomyces odorifer (Rullman 

 emend. Lachner-Sandoval, 1898) Waksman 

 (Lachner-Sandoval, A'. Ueber Strahlenpilze. 

 Strassburg, 1898). 



Morphology: Sporophores long, straight, 

 branching, forming spirals. Spores spherical. 



Sucrose nitrate agar: Growth cream-col- 

 ored, with trace of brown. Aerial mycelium 

 abundant, cream-colored. 



Glucose-asparagine agar: Growth cream- 



colored to brownish. Aerial mycelium abun- 

 dant, cream-colored. Soluble pigment faint 

 brownish. 



Nutrient agar: Growth folded, brown. 

 Aerial mycelium white around edge. Soluble 

 pigment faint brown. 



Starch agar: Growth cream-colored to 

 brown. Aerial mycelium abundant, cream- 

 colored to straw-colored. No soluble pig- 

 ment. Hydrolysis good. 



Maltose-peptone agar: Foulerton and 

 Price-Jones (1902) described growth as 

 "raised, drab-colored, semi-translucent, the 

 sin face 1 becoming reticulated; soluble pig- 

 ment deep brown; gelatin liquefied, with 

 light brown pigmentation." 



Potato: Growth folded, brownish. Aerial 

 mycelium cream-colored. Soluble pigment 

 faint brown. 



Gelatin: Surface ring cream-colored. Ae- 

 rial mycelium thin, white. No soluble pig- 

 ment. Liquefaction slow. 



Milk: Surface ring colorless to brownish. 

 No aerial mycelium. No coagulation; some 

 peptonization. 



Cellulose: Good growth. 



Sucrose: Inversion. 



Paraffin and fats: Good growth. 



Nitrate reduction: Positive. 



Production of H 2 S: Negative. 



Odor: Strong, characteristic of soil. 



Antagonistic properties: Some strains give 

 positive effects, others are negative. 



Habitat: Soil. 



Type culture: IMRU 3334. 



173. Streptomyces oidiosporus (Krassilni- 

 kov, 1941) Waksman (Krassilnikov, N. A. 

 Actinomycetales. Izvest. Akad. Nauk. 

 SSSR, Moskau, p. 23, 1941). 



Morphology: Sporophores straight or 

 wavy, never forming spirals; short or long, 

 frequenl ly forming broom-shaped structures. 

 Spores 1.0 to 1.8 by 0.5 to 1.0 n, frequently 

 appearing as double cocci or segmented 

 spores (oidiospores) . 



Agar media: Growth red or rose to pale; 



