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.
