FAMILY III. STEEPTOMYCETACEAE 



777 



Sucrose not inverted. 



Starch is hydrolyzed. 



Antagonistic properties: No activity 

 against mycobacteria. 



Source: Isolated from soil. 



Habitat: Soil, food products and pota- 

 toes. 



52. Streptoniyces cyliiidrosporus 



(Krassilnikov, 1941) Waksman, 1953. {Acti- 

 nomyces cylindrosporus Krassilnikov, Guide 

 to the Actinom3'cetes, Izd. Akad. Nauk, 

 U.S.S.R., Moskau, 1941, 57; Waksman, in 

 Waksman and Lechevalier, Actinomycetes 

 and Their Antibiotics, Baltimore, 1953, 68.) 



cy.lin.dro'spo.rus. Gr. mas.n. cylindrus 

 a cylinder; Gr. fem.n. spora a seed; M.L. 

 noun spora a spore; M.L. adj . cylindrosporus 

 cylinder-spored. 



Vegetative growth: Cultures readily lose 

 capacity to produce spores. 



Aerial mycelium: Well developed, cot- 

 tony or velvety, grayish white. Sporo- 

 phores straight; spores cylindrical, 0.7 by 

 1.0 to 1.7. microns. 



Gelatin: Liquefaction. 



Agar: Dark brown growth with white 

 aerial mycelium. 



Synthetic agar: Velvety, dark brown or 

 chocolate colonies. White-gray aerial myce- 

 lium. 



Milk: Slightly coagulated, weakly pep- 

 tonized with milk becoming brown to almost 

 black. 



Sucrose not inverted. 



Starch is weakly hydrolyzed. 



No growth on cellulose. 



Nitrites produced from nitrates. 



Antagonistic properties: None. 



Source: Isolated from soil. 



Habitat: Soil. 



53. Streptomyces viridochromogenes 



(Krainsky, 1914) Waksman and Henrici, 

 1948. (Actinomyces viridochromogenes Krain- 

 sky, Cent. f. Bakt., II Abt., 4I , 1914, 662; 

 Waksman and Henrici, in Manual, 6th ed., 

 1948, 942.) 



vi.ri.do.chro.mo'ge.nes. L. adj. viridis 

 green; Gr. noun chroma color; Gr. v. suffix 

 -genes producing; M.L. adj. viridochromo- 

 genes producing green color. 



Aerial mycelium: Hyphae with numer- 



ous open spirals, 3 to 5 microns in diameter, 

 occurring as side branches; spores short, 

 ellipsoidal or spherical, 1.25 to 1.50 microns. 



Gelatin: Cream-colored surface growth, 

 becoming greenish. Slow liquefaction. 



Agar: Abundant, restricted, gray growth 

 with greenish tinge. 



Synthetic agar: Spreading growth, cream- 

 colored with dark center, becoming dark 

 green; reverse yellowish to light cadmium. 

 Aerial mycelium abundant, spreading, 

 white, becoming light green. 



Starch agar: Circular, spreading, yellow- 

 ish colonies. 



Glucose agar: Abundant, spreading, 

 wrinkled, gray growth, becoming black. 



Glucose broth: Dense, solid ring, brown- 

 ish, becoming dark green. 



Litmus milk : Dark brown surface growth ; 

 coagulated; peptonized, with faintly alka- 

 line reaction. 



Potato: Abundant, gray-brown growth. 



Soluble brown pigment formed. 



Starch is hydrolyzed. 



Nitrites produced from nitrates. 



Aerobic. 



Optimum temperature, 37° C. 



Antagonistic properties: Active upon 

 fungi. 



Source: Isolated from soil. 



Habitat: Soil. 



54. Streptoniyces piirpureochromo- 

 genes (Waksman and Curtis, 1916) Waks- 

 man and Henrici, 1948. {Actinomyces purpeo- 

 chromogenus (sic) Waksman and Curtis, 

 Soil Sci., /, 1916, 113; Streptomyces purpeo- 

 chromogenus (sic) Waksman and Henrici, 

 in Manual, 6th ed., 1948, 943.) 



pur.pur.e.o.chro.mo'ge.nus. L. adj. pur- 

 pureus purple-colored; Gr. noun chroma 

 color; Gr. v. suffix -genes producing; M.L. 

 adj. purpureochromogenes producing purple 

 color. 



Aerial mj'celium: Branching mycelium 

 and hyphae with few imperfect spirals. 

 Conidia spherical, 0.75 to 1.0 micron in di- 

 ameter. 



Gelatin stab: Slow, brownish surface 

 growth. Slow liquefaction. 



Agar: Gray to brownish growth, becom- 

 ing dark brown, almost black. 



Synthetic agar: Slow, restricted, smooth, 



