FAMILY III. STREPTOMYCETACEAE 



809 



Milk: Good surface growth; growth in 

 medium cloudj'. Aerial mj'celium scant, 

 white. Rapidly coagulated and gradually 

 peptonized. 



Potato: Gray to olive-graj' growth. Aerial 

 mj'celium either absent or white, turning 

 gray. Soluble brown pigment. 



Starch is hydrolj-zed. 



Tyrosinase reaction: Negative. 



Nitrites usually produced from nitrates. 



Optimum temperature 37.5° C. 



Source: Isolated from ruptured, pitted 

 type potato scab. 



Habitat: Soil. 



127. Streptoniyces loidensis (Millard 

 and Burr, 1926) Waksman, 1953. {Actinomy- 

 ces loidensis Millard and Burr, Ann. Appl. 

 Biol., 13, 1926, 601; Waksman, in Waksman 

 and Lechevalier, Actinomycetes and Their 

 Antibiotics, Baltimore, 1953, 110.) 



lo.i.den'sis. M.L. adj. loidensis pertaining 

 to Loidy; named for Loidy, a place in 

 Siberia. 



Aerial mycelium: Spores cylindrical to 

 spherical, 0.9 to 0.95 by 0.9 to 1.0 micron. 



Gelatin: Gray growth with scant, white 

 aerial mycelium. Soluble yellow pigment. 

 Rapid liquefaction. 



Synthetic sucrose agar: Thin, flat, gray to 

 3'ellowish olive growth. Aerial mycelium 

 scant, olive-colored. Soluble yellow pig- 

 ment. 



Synthetic glucose agar: Thin, graj'ish 

 olive growth. Aerial mycelium olive-buff. 

 Soluble, light golden to yellowish pigment. 



Potato agar: Good, gray growth. Aerial 

 mycelium olive-buff. Soluble, golden brown 

 pigment. 



Glycerol synthetic solution : Flaky growth, 

 mostly at bottom. Aerial mycelium scant, 

 buff-colored. 



Glucose broth: Growth on surface and at 

 bottom good, gray to golden brown. Aerial 

 mycelium olive-buff. Soluble, golden brown 

 pigment. 



Milk: Excellent surface growth covered 

 with white aerial mj'celium. Coagulated; 

 rapidly peptonized. 



Starch is hydrolyzed. 



Tyrosinase reaction: Negative. 



Nitrites not produced from nitrates. 



Grows well at 37.5° C. 



Source: Isolated from a medium-sized 

 ruptured potato scab. 



Habitat: Found in potatoes so far as 

 known. 



128. Slreptomyces wedmorensis (Mil- 

 lard and Burr, 1926) Waksman, 1953. (.4c- 

 tinomyces wedmorensis Millard and Burr, 

 Ann. Appl. Biol., 13, 1926, 601; Waksman, 

 in Waksman and Lechevalier, Actinomy- 

 cetes and Their Antibiotics, Baltimore, 

 1953, 110.) 



wed.mo.ren'sis. M.L. adj. wedmorensis 

 pertaining to Wedmore; named for Wed- 

 more, a city in England. 



Aerial mycelium: Sporophores simple, 

 straight, branched, closely septated. Spores 

 ellipsoidal to cylindrical, 0.6 to 0.8 by 0.8 

 to 0.9 micron. 



Gelatin : Fair growth. No aerial mycelium. 

 Liquefaction. 



Synthetic sucrose agar: Flat, thin, gray- 

 ish growth covered with white to gray aerial 

 mycelium. 



Synthetic glucose agar: Good, grayish 

 growth with crater-like dark spots. Mod- 

 erate amount of gray aerial mycelium. 



Potato agar: Wrinkled, good, grayish 

 growth. No aerial mycelium. 



Glycerol synthetic solution: Good growth 

 in form of spongy masses at bottom and 

 numerous colonies throughout medium; 

 surface growth granular. Aerial mycelium 

 gray, flecked with white. 



Glucose broth: Small flakes and minute 

 colonies at bottom and at surface. 



Milk: Greenish surface growth. Coagu- 

 lated; slowly peptonized. 



Potato: Wrinkled, grayish growth covered 

 with white aerial mycelium. Plug pigmented 

 drab. 



Starch is hydrolyzed. 



Tyrosinase reaction: Negative. 



Nitrites produced from nitrates. 



Grows well at 37.5° C. 



Source: Isolated from peat soil. 



Habitat: Soil. 



129. Slreptomyces scabies (Thaxter, 

 1891) Waksman and Henrici, 1948. (Oospora 

 scabies Thaxter, Ann. Rept. Conn. Agr. 

 Exp. Sta., 1891, 153; Waksman and Henrici, 

 in Manual, 6th ed., 1948, 957.) 



