nomyces roseus Namyslowski, Cent, f . Bakt., I Abt., Orig., 62, 1912, 567; Actinomyces roseochrotnogenus (sic) Jensen, Proc. Lin- nean Soc. New So. Wales, 56, 1931, 359; Sirepiomyces roseochromogenus (sic) Waks- man and Henrici, in Manual, 6th ed., 1948, 937.) ro.se. o.chro.mo'ge.nes. L. adj. roseus rosy; Gr. noun chroma color; Gr. v. suffix -genes producing; M.L. adj. roseochromo- genes producing a red color. Vegetative growth: Red to rose-colored pigment; produces dark brown soluble sub- stance. Aerial mycelium: Well developed. Sporo- phores produce numerous open and closed spirals. Spores 1.0 to 1.2 by 1.5 to 3.0 mi- crons. Gelatin stab: Liquefaction, with small, cream-colored colonies in bottom of liquid. Agar: White growth, becoming yellowish. Synthetic agar: Thin, spreading, color- less growth. Aerial mycelium thin, pale, brownish. Starch agar: Colorless, spreading growth. Glucose agar: Growth extensive, spread- ing, colorless, entire. Glucose broth: Cream-colored ring; flaky sediment. Litmus milk: Brownish ring. Coagula- tion limited. Peptonized in 10 to 15 days, becoming strongly alkaline. Potato : Much wrinkled, brownish growth. Purple pigment on egg media; brown on gelatin. Starch is hydrolyzed. Nitrites produced from nitrates. Aerobic. Optimum temperature, 37° C. Antagonistic properties: Active against various bacteria; produces an antibiotic, roseomycin. Source: Isolated from soil. Habitat: Soil. 41. Streptomyces cinnamonensis Ok- ami, 1952. (Okami, in Maeda, Okami, Kosaka, Taya and Umezawa, Jour. Anti- biotics (Japanese), 5, 1952, 572; also see Okami, Maeda, Kosaka, Taya and Ume- zawa, Jap. Jour. Med. Sci. and Biol., 6, 1953, 87.) cin.na.mo.nen'sis. Gr. neut.n. cinna- mum cinnamon; M.L. adj. cinnamonensis relating to cinnamon. Vegetative growth: Fine branching my- celium. Aerial mycelium: 0.8 to 1.2 microns in diameter; long filamentous mycelium; no spirals. Spores ellipsoidal. Gelatin: Colorless to dark brownish growth. Aerial mycelium in form of white patches. Soluble brown pigment. No lique- faction or very slow liquefaction. Agar: Colorless to dark growth. No aerial mycelium. Soluble, slightly brown pigment may be produced. Glucose asparagine agar: Colorless to light cream-colored growth. White to white- pinkish-cinnamon aerial mycelium with light brownish-vinaceous tinge. No soluble pigment. Synthetic glycerol agar: Colorless, spreading growth. Scant, white aerial my- celium or white with pale cinnamon-pinkish to light brownish-vinaceous tinge. No solu- ble pigment. Starch agar: Colorless, spreading growth. Aerial mycelium white with pinkish tinge. No soluble pigment. Loeffler's blood serum: Colorless to dark colored growth. No aerial mycelium. Soluble brown pigment. No liquefaction. Blood agar: Dark to brownish growth. No aerial mycelium. Soluble brown pig- ment. No hemolysis. Milk: Cream-colored to brownish surface ring. No aerial mycelium or scant, white. No soluble pigment or slightly brown. Not coagulated; may be very slowly peptonized. Potato plug: Light cream- to dark-colored growth. No aerial mycelium. No soluble pigment, later black pigment produced around growth. Starch is actively hydrolyzed. Cellulose not decomposed. Sucrose, mannose, dextrin, galactose, glycerol, fructose, glucose, maltose, manni- tol, xylose and sodium succinate are utilized as carbon sources. Arabinose, esculin, rhamnose, dulcitol, sodium acetate, inulin and lactose are not utilized as carbon sources. Salicin and raffinose are negative. Nitrites not produced from nitrates. Antagonistic properties: Produces an antibiotic which is active against myco-
