FAMILY III. STREPTOMYCETACEAE 



769 



mycelium, 0.8 to 1.0 micron, forming nu- 

 merous conidia; flaky growth produced on 

 bottom; surface growth becomes covered 

 with a white aerial mycelium; reverse side, 

 brownish red. 



Synthetic solution: Cream-colored, punc- 

 tiform growth with yellowish aerial myce- 

 lium; no soluble pigment. 



Peptone solution: Whitish growth that 

 flakes throughout liquid; yellowish pigment. 



TjTOsine medium: White growth with 

 yellowish reverse; yellowish soluble pig- 

 ment. 



Milk: Colorless growth becoming covered 

 with whitish aerial mycelium; slow pep- 

 tonization of milk which becomes rose- 

 colored, finally changing to brownish red. 



Potato: Cream-colored to j-ellowish 

 growth with whitish aerial mycelium; red- 

 dish brown pigmentation of plug. 



Coagulated serum: Cream-colored growth 

 with whitish aerial mycelium; rapid lique- 

 faction of serum. 



Distinctive characters : Abundant growth 

 upon neutral and acid media; whitish aerial 

 mycelium; marked odor; soluble brownish 

 red pigment. 



Relationships to other species : This spe- 

 cies seems to form the transition type be- 

 tween the Streptomyces albus group and the 

 Streptomyces chrotnogenes group. 



Source: Isolated from manure. 



Habitat: Found abundantly in manure. 



37. Streptomyces felleus Lindenbein, 

 1952. (Streptomyces felleus Brockmann and 

 Henkel {nornen nudum), Chem. Ber., 84, 

 1951, 284; Lindenbein, Arch. f. Mikrobiol., 

 17, 1952, 374.) 



fel'le.us. L. adj. felleus of gall, like gall. 



Aerial mycelium: Hyphae long, straight, 

 branching. Spores spherical. 



Gelatin: Colorless growth. No aerial my- 

 celium. No soluble pigment. No liquefac- 

 tion. 



Agar: Colorless diffuse growth with 

 brownish yellow reverse. No aerial myce- 

 lium. Soluble light brownish yellow pig- 

 ment. 



Synthetic agar: Effused, smooth growth 

 with yellow-brown reverse. Aerial mj^celium 

 velvety gray -white. Soluble yellowish brown 

 pigment. 



Ca-malate agar: Crumb-like, colorless to 

 yellowish growth. Aerial mycelium pow- 

 dery gray-white. Soluble 3'ellowish brown 

 pigment. 



Glucose asparagine agar: Thin, colorless 

 growth with j'ellowish reverse. Aerial my- 

 celium powdery gray-white. Soluble brown- 

 ish pigment. 



Starch agar: Lichenoid, colorless growth. 

 Aerial mycelium powdery white. No solu- 

 l)le pigment. 



Glucose agar: Effused, crumb-like, j-el- 

 lowish brown growth. Aerial mycelium 

 powdery graj'-white. Soluble light brown 

 pigment. 



Glucose broth: Fine sediment with some 

 flakes; later a colorless ring on surface. No 

 aerial mycelium and no soluble pigment. 



Milk: Brownish to orange growth. Aerial 

 mycelium velvety gray-white. Peptonized. 



Potato: Heavy, brownish yellow growth. 

 Aerial mycelium powdery. Faint reddish 

 pigment around growth. 



Starch is actively hydrolyzed. 



No growth on cellulose. 



Odor: Typical earthy. 



Antagonistic properties: Produces picro- 

 mycin. 



Source: Isolated from soil. 



Habitat: Soil. 



38. Streptomyces achromogenes Ok- 



ami and Umezawa, 1953. (Okami and Ume- 

 zawa, in Umezawa, Takeuchi, Okami and 

 Tazaki, Jap. Jour, of Med. Sci. and Biol., 

 6, 1953, 266.) 



a.chro.mo'ge.nes. Gr. adj. achromus 

 colorless; Gr. v. gennaio to produce; M.L. 

 adj . achromogenes producing no color. 



Aerial mj'celium: Fine branching aerial 

 hj'phae, no spirals. Spores cylindrical. 



Gelatin: Yellowish brown, restricted 

 growth. No aerial mycelium. Soluble, 

 slightly brown pigment. Yevy weak lique- 

 faction. 



Agar: Wrinkled, elevated, colorless to 

 brownish growth. No aerial mycelium. No 

 soluble pigment. 



Glucose asparagine agar: Yellowish 

 brown, restricted growth with brown re- 

 verse. Scant yellowish white aerial myce- 

 lium. Slightly brown soluble pigment may 

 be weakly produced. 



