FAMILY III. STREPTOMYCETACEAE 



773 



No growth on cellulose. 



Antagonistic properties : Produces resisto- 

 mycin, which is present in the mycelium 

 and which is active against Gram-positive 

 bacteria. 



Source: Isolated from soil. 



Habitat: Soil. 



44. Streptoniyces diastatochronio- 



genes (Krainsky, 1914) Waksman and Hen- 

 rici, 1948. {Actinomyces diastaiochromo- 

 genes Krainsky, Cent. f. Bakt., II Abt., 4^, 

 1914, 662; Waksman and Henrici, in Manual, 

 6th ed., 1948, 941.) 



di.a.sta.to.chro.mo'ge.nes. Gr. adj. dia- 

 status split, divided; M.L. adj. diastatus 

 diastatic; Gr. noun chroma color; Gr. v. 

 suffix -genes producing; M.L. adj. diastaio- 

 chromogenes producing diastatic color (pre- 

 sumably intended to mean producing dias- 

 tase and color). 



Aerial mycelium: Conidia spherical or 

 ellipsoidal, about 1.2 microns. 



Gelatin colonies: Light gray-colored. 

 Soluble brown pigment formed. 



Gelatin stab : Liquefaction. 



Agar: Medium-sized colonies, colorless, 

 with white to gray aerial mycelium. 



Ca-malate agar: Medium-sized colonies, 

 colorless, with gray aerial mycelium. 



Glucose agar: Same as on Ca-malate agar. 



Starch agar: Same as on Ca-malate agar. 



Glucose broth: Flaky colonies in depth 

 at first, later also over surface. 



Potato: Light gray colonies; gray aerial 

 mycelium; medium colored black. 



Weakly diastatic. 



No growth on cellulose. 



Tyrosinase produced. 



Aerobic. 



Optimum temperature, 35° C. 



Antagonistic properties: Very strong. 



Source: Isolated from soil. 



Habitat: Soil. 



45. Streptomyces flavochromogenes 



(Krainsky, 1914) Waksman and Henrici, 

 1948. (Actinomyces flavochromogenes Krain- 

 sky, Cent. f. Bakt., II Abt., 41, 1914, 662; 

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

 1948, 941.) 

 fla.vo.chro.mo'ge.nes. L. adj. ^ai;ws yel- 



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

 -genes producing; M.L. ad] . flavochromogenes 

 producing j^ellow color. 



Aerial mycelium: Conidia ellipsoidal, 1.7 

 microns. 



Gelatin colonies: Yellowish. 



Gelatin stab: Slight liquefaction. 



Agar: Aerial mycelium formed late, at 

 first white, later gray. Gray soluble pigment 

 formed. 



Ca-malate agar: Colonies yellow with 

 white aerial mycelium forming late. 



Glucose agar: Brown soluble pigment 

 formed. 



Starch agar: Yellow colonies, with white 

 aerial mycelium. 



Glucose broth: Fine flakes, with small 

 spherical colonies adherent to glass. Me- 

 dium colored brown. 



Potato: Yellow colonies with white aerial 

 mycelium. 



Weakly diastatic. 



Esculin is attacked. 



Slow growth on cellulose. 



Tyrosinase formed. 



Nitrites produced from nitrates. 



Aerobic. 



Optimum temperature, 35° C. 



Source: Isolated from soil. 



Habitat: Soil. 



46. Streptomyces bikiniensis John- 

 stone and Waksman, 1948. (Jour. Bact., 55, 

 1948, 317.) 



bi.ki.ni.en'sis. M.L. adj. bikiniensis per- 

 taining to the Bikini Islands. 



Aerial mycelium: Hyphae straight, 

 branched heterogeneously. No spirals. 

 Conidia ellipsoidal. 



Gelatin: Slight liquefaction. 



Agar: Luxuriant growth with a moderate 

 amount of white aerial mycelium. Deep 

 brown soluble pigment. 



Synthetic agar: White growth becoming 

 pallid neutral gray with white tinge. Aerial 

 mycelium abundant. Light brown soluble 

 pigment. Amber-colored superficial drop- 

 lets. 



Glucose-asparagine agar: Luxuriant 

 growth. Aerial mycelium white to mouse- 

 gray. Soluble light amber pigment. 



